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9th-grade-vocabulary-words

English Vocabulary · Grade 9 Live Review Preview

9th Grade Vocabulary Words

Ninth grade marks the transition to high-school reading and writing across literature, argument, research, biology, physical and Earth science, algebra, computing, world history, civics, and geography. This level develops precise academic and domain-specific vocabulary while strengthening context, nuance, source evaluation, figurative language, and evidence-based communication.

This independently authored 800-word beta curriculum is arranged in twenty-three pages of up to thirty-five words. Pages containing words 1–500 include five cloze questions drawn only from that enhanced range; words 501–800 remain fully visible and editable as list pages while the expanded practice layer is developed. Each row includes a subject-field label and an editable word-study note about a transparent affix, compound structure, capitalization, or dictionary base form. The cited Grade 9 resources calibrate difficulty and study skills only; all learner-facing definitions, examples, quizzes, and descriptions are original KSSR copy.

Please note: the vocabulary lists for grades 9~11 have been selected to ensure no overlap with the previous grade level. If the words are too specialized or difficult for you, please go back to grade levels 4~8 and review the words on those pages.

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800 words
Words 36–70 of 800
#WordDetailsMeaningSample sentence
36verifiabilitynoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ability forms a noun for the capacity to have a quality or perform an action.

検証可能性A precise citation increases the verifiability of a historical claim.
37working hypothesisnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: working + hypothesis. Study the complete expression as one field-specific unit.

作業仮説The team treated soil acidity as a working hypothesis rather than a proven cause.
38exemplificationnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.

The essay uses exemplification by describing one neighborhood that reduced food waste.
39qualificationnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.

資格The author adds a qualification because the policy does not affect every resident equally.
40concessionnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.

租界The debate response begins with a concession that the proposal would require extra funding.
41rebuttalnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Base-form focus: rebuttal is the dictionary headword; compare its inflected or derived forms in context.

反論Her rebuttal shows that the cited survey excluded rural voters.
42assertionnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.

主張The article makes the assertion that the lake is clean but provides no water-quality data.
43coherencenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.

関係Repeated key terms give the essay coherence from one paragraph to the next.
44supporting detailnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: supporting + detail. Study the complete expression as one field-specific unit.

サポート詳細The temperature record is a supporting detail for the paragraph about climate change.
45peer reviewnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: peer + review. Study the complete expression as one field-specific unit.

査読Peer review prompted the researcher to clarify how participants were selected.
46intellectual propertynoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: intellectual + property. Study the complete expression as one field-specific unit.

知的財産A patent is one way the law can protect intellectual property.
47paraphrasingnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Base-form focus: paraphrasing is the dictionary headword; compare its inflected or derived forms in context.

言い換えるEffective paraphrasing changes both the vocabulary and the sentence structure of the source.
48close readingnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: close + reading. Study the complete expression as one field-specific unit.

精読A close reading of the final stanza reveals a shift from anger to acceptance.
49context cluenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: context + clue. Study the complete expression as one field-specific unit.

文脈の手掛かりThe phrase “unable to bend” provides a context clue for the word rigid.
50reference worknoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: reference + work. Study the complete expression as one field-specific unit.

参考図書An etymological dictionary is a reference work for studying word origins.
51root wordnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: root + word. Study the complete expression as one field-specific unit.

ルートワードHelp is the root word in helpful and helpless.
52conclusiveadjective
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.

決定的One blurry photograph is not conclusive evidence that the rare bird has returned.
53scrutinynoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Base-form focus: scrutiny is the dictionary headword; compare its inflected or derived forms in context.

精査The budget came under scrutiny after auditors found several unexplained payments.
54rationalenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Base-form focus: rationale is the dictionary headword; compare its inflected or derived forms in context.

所為The proposal states the rationale for preserving the wetland.
55corroborationnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.

確認Phone records provided corroboration for the witness's account.
56affirmative casenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: affirmative + case. Study the complete expression as one field-specific unit.

肯定的な場合The affirmative case argues that later school start times improve student health.
57burden of proofnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: burden + of + proof. Study the complete expression as one field-specific unit.

証拠を提示する義務A person making an extraordinary accusation carries the burden of proof.
58causal claimnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: causal + claim. Study the complete expression as one field-specific unit.

因果関係の主張The causal claim requires stronger evidence than the observation that two trends occur together.
59counterevidencenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.

反証The colder years provide counterevidence to the proposed simple pattern.
60counterpointnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Prefix focus: counter- means against, opposing, or responding to.

対位法The memoir offers a counterpoint to the official version of the event.
61faulty reasoningnoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: faulty + reasoning. Study the complete expression as one field-specific unit.

誤った推論The claim that one rainy day disproves climate change relies on faulty reasoning.
62false analogynoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: false + analogy. Study the complete expression as one field-specific unit.

誤った例えComparing a school to a prison is a false analogy when the differences are ignored.
63false dilemmanoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: false + dilemma. Study the complete expression as one field-specific unit.

誤ったジレンマThe statement “support this plan or oppose all progress” creates a false dilemma.
64hasty generalizationnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: hasty + generalization. Study the complete expression as one field-specific unit.

性急な一般化Judging an entire city by one unpleasant visit is a hasty generalization.
65loaded languagenoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: loaded + language. Study the complete expression as one field-specific unit.

ロードされた言語Calling a small fee an “outrageous theft” uses loaded language.
66logical appealnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: logical + appeal. Study the complete expression as one field-specific unit.

論理的なアピールThe report's logical appeal rests on cost comparisons and safety data.
67emotional appealnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: emotional + appeal. Study the complete expression as one field-specific unit.

感情に訴えかけるThe rescue photograph creates an emotional appeal for donations.
68ethical appealnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: ethical + appeal. Study the complete expression as one field-specific unit.

倫理的アピールThe physician builds an ethical appeal by describing her relevant experience and standards.
69reasoned judgmentnoun
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Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: reasoned + judgment. Study the complete expression as one field-specific unit.

合理的な判断After comparing the risks and benefits, the panel issued a reasoned judgment.
70rebuttal evidencenoun
Study

Field: Grade 9 research, reasoning, and source-literacy term

Word study: Term structure: rebuttal + evidence. Study the complete expression as one field-specific unit.

反証証拠The later census figures serve as rebuttal evidence against the population claim.

Vocabulary reading and practice

Page 2 vocabulary review

Review five selected words from page 2.

Vocabulary quiz

Choose the dictionary equivalent for each of 5 selected words.

Sources and curriculum references

These references guide selection and calibration. Definitions, sample sentences, readings, questions, and teaching notes are independently written and reviewed.