チェックchekku

1. no-adjectivecheck (pattern); plaid
   彼かれの稿こう模様もようのスーツとチェックのネクタイは合あわなかった。↗

   His striped suit and checked tie didn't match.
2. noun, suru verb, transitive verbcheck; inspection; examination; looking over; scrutinizing
   エンジンをチェックしましたか。↗

   Have you checked the engine?
3. noun, suru verb, intransitive verbcheck (mark); tick; marking with a check; checking off; ticking
   私は仕事しごとを一ひとつ終おえるごとにリストの上うえでチェックする。↗

   I check off each task on my list as soon as I complete it.
4. noun, suru verb, transitive verbchecking (something) out; following (with interest); keeping one's eye on; keeping a close watch on
5. nouncheck (bill of exchange); cheque
6. noun(restaurant) bill; check
7. nouncheck (in chess)

• Synonym確かめるたしかめるNeutralNeutral verb for making sure or verifying, as in 「事実を確かめる」; the emphasis is on establishing what is true.
• Synonym検査けんさNeutralNeutral but fairly formal. Checking for abnormalities, as in 「健康検査」 and 「手荷物検査」.
• Synonym調べるしらべるNeutralNeutral verb for looking things up or investigating, as in 「辞書で調べる」; the most all-purpose of these.
• Synonym点検てんけんNeutralNeutral. Checking item by item, as in 「設備の点検」; mostly for machinery and facilities.
• Synonym監査かんさFormalFormal. Auditing and oversight, as in 「会計監査」; mostly in financial contexts.
• Related調査ちょうさWrittenWritten/formal prose. Investigating actual conditions, as in 「市場調査」; broader in scope than 「チェック」, with the focus on getting at the facts.
• Related試験しけんNeutralNeutral. Exams or testing how something performs, as in 「性能試験」; the emphasis is on the test results.
• Related審査しんさWrittenWritten/formal prose. Screening and judging whether something passes or how it ranks, as in 「書類審査」; carries a sense of adjudication.
• Related分析ぶんせきWrittenWritten/formal prose. Breaking something down to study its makeup, as in 「データ分析」; the emphasis is on dissection.
• Related診断しんだんWrittenWritten/formal prose. Medical diagnosis or fault-finding, as in 「健康診断」 and 「システム診断」.
• Related検定けんていWrittenWritten/formal prose. Certification exams or official vetting, as in 「漢字検定」.
• Related改めるあらためるWrittenWritten/formal prose. When written 「検める」, it means to inspect, as in 「切符を検める」; has an old-fashioned ring.
• Related精査せいさWrittenWritten/formal prose. Careful, thorough examination, as in 「データを精査する」; goes deeper than 「チェック」.
• Related見定めるみさだめるWrittenWritten/formal prose. Looking closely and settling on a judgement, as in 「真偽を見定める」; the emphasis is on deciding.
• Related検分けんぶんWrittenWritten/formal prose. Going on site to inspect and confirm, as in 「現場を検分する」; mostly official use.
• RelatedテストCasualColloquial loanword for tests and trials; the emphasis is on gauging ability or performance.
• Related監察かんさつFormalFormal. Supervisory inspection, mostly in government circles, as in 「監察官」.
• Related吟味ぎんみWrittenWritten/formal prose. Careful scrutiny and selection, as in 「素材を吟味する」; implies fastidious care.
• Related検討けんとうWrittenWritten/formal prose. Weighing something from many angles, as in 「検討します」; the emphasis is on deliberation.
• Related照らし合わせるてらしあわせるWrittenWritten/formal prose. Comparing one thing against another, as in 「原本と照らし合わせる」; the emphasis is on cross-checking.
• Antonym無視むしNeutralNeutral antonym of 「チェック」: to ignore or disregard.
• Antonym放置ほうちNeutralNeutral antonym of 「チェック」: to leave something unattended.

For everyday checking and verifying, 「チェック」 is the colloquial default. Use 「検査」 for formal inspections, 「点検」 for machinery checks, 「調査」 for investigating actual conditions, 「確かめる」 for confirming the truth, 「照らし合わせる」 for comparing against something, 「監査」 for audits, and 「無視」 when something is ignored instead of checked.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 検査けんさ、点検てんけん。
2. 照合しょうごう。
3. 阻止そし。
4. 小切手こぎって。
5. 伝票でんぴょう。
6. 相手あいてが何なんもしなければ次つぎの手てでキングが取とれる状態じょうたい。王手おうて。
7. （模様もよう）市松いちまつ模様もよう、格子縞こうしじま。
8. 検査けんさする。点検てんけんする。
9. 照合しょうごうする。
10. （チェス）相手あいてが何なんもしなければ次つぎの手てでキングが取とれる状態じょうたいにする。王手おうてをかける。