契約書|けいやくしょkeiyakusho

1. noun(written) contract; agreement
   彼かれらは彼かれに無理矢理むりやり契約書けいやくしょにサインさせた。↗

   They made him sign the contract.

• Synonym証文しょうもんWrittenAn old-fashioned term for a document serving as proof, such as an IOU or deed.
• Synonym約定書やくじょうしょWrittenA written record of agreed terms; leans legal and financial, and is rarely used.
• RelatedコントラクトNeutralA loanword for 'contract', heard mostly in business and IT settings; not common in everyday speech.

For a written contract in everyday use, say 「契約書」, as in 「契約書にサインする」. Use 「コントラクト」 in business or IT talk, 「約定書」 in legal or financial writing, and 「証文」 for old-style written pledges; an IOU is 「借用書」.

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

1. 契約けいやくの内容ないようを記載きさいし、契約けいやくの成立せいりつを証明しょうめいする書面しょめん。