任|にんnin[1]atamadaka (head-high)

1. nounobligation; duty; charge; responsibility

• Synonym任務にんむNeutralAn assigned task or mission, as in 「任務を果たす」; 「任」 appears mostly in set phrases like 「任に当たる」.
• Synonym勤めつとめNeutralDuties one is bound to fulfill; also working at a job. Common in speech.
• Synonym職務しょくむWrittenThe work attached to one's post, as in 「職務怠慢」; leans formal.
• Synonym役やくNeutralA role, post, or job one holds; also a part in a play. Broader in use than 「任」.
• Synonym役目やくめNeutralA duty or role one bears; common in speech, while 「任」 is written and mostly in set phrases.
• Synonym責務せきむWrittenAn obligation one must see through; heavy in tone, mostly in formal settings.
• Synonym義務ぎむNeutralWhat law or morality requires, the counterpart of rights; 「任」 is a charge or entrusted duty, mostly in set phrases.
• Synonym役回りやくまわりNeutralThe role assigned to you, often an unenviable one, as in 「損な役回り」.
• Synonym責任せきにんNeutralResponsibility one bears, including its consequences; 「任」 is a charge or mission, seen in 「任に当たる」「任が重い」.
• Synonym職分しょくぶんWrittenOne's proper duty within a post; written and old-fashioned. Everyday speech prefers 「職務」 or 「本分」.
• Synonymお勤めおつとめNeutralPolite form of 「勤め」: a job, also sutra reading before a Buddha, and even a bargain or discount.
• Synonymお役目おやくめNeutralA weighty way to say 「役目」, often teasing or solemn; everyday speech uses 「役目」.
• Related仕事しごとNeutralThe most common word: work, a job, or a task to do; 「任」 is written and means a charge one bears.
• Related役割やくわりNeutralAn assigned role or duty, as in 「役割分担」; far more common than 「任」.
• RelatedタスクNeutralLoanword for a concrete to-do item, also a computer task; workplace and IT settings.
• Related業務ぎょうむNeutralWork handled as part of one's profession, as in 「業務連絡」; company and organization contexts.

「任」 lives mostly in set phrases like 「任に当たる」 and 「任が重い」. For everyday duties or roles use 「役目」 or 「役割」; for an assigned task or mission, 「任務」; for work in general, 「仕事」. Formal prose prefers 「職務」 and 「責務」; 「義務」 and 「責任」 stress obligation and accountability.

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

1. (ニン) 課かせられた仕事しごと。果はたすべき役目やくめ。
2. (ニン)任務にんむにふさわしい能力のうりょくを持もつこと。
3. (まき、まけ) 任命にんめいすること。