怠慢|たいまんtaiman[0]heiban (flat)

1. noun, na-adjectivenegligence; neglect; carelessness; procrastination
   彼かれは義務ぎむ怠慢たいまんで非難ひなんされた。↗

   He was blamed for neglect of duty.

• Synonym不行き届きふゆきとどきWrittenWritten-style word for care or management falling short, as in poor service or supervision; often used in apologies.
• SynonymなおざりNeutralLeaving something unattended and not taking it seriously, as in 「なおざりにする」; stresses disregard, unlike 「おざなり」, which is dealing with things perfunctorily.
• Synonym怠りおこたりNeutralA noun for negligence and laxity, as in 「準備の怠り」; very close to 「怠慢」 in meaning.
• Synonym緩怠かんたいWrittenWritten word for laxity and letting duties slide; rare in modern usage — in everyday speech 「怠慢」 is the normal choice.
• Synonym疎慢そまんWrittenWritten, little-used word for slipshod, careless work; stresses the rough, sloppy manner rather than neglect of duty.
• Synonym疎漏そろうWrittenWritten word for omissions arising from rough, imprecise handling; the emphasis is on the carelessness behind the lapse.
• SynonymゆるがせWrittenWritten-style word for treating something too lightly; mostly seen in the negative 「ゆるがせにしない」.
• Related手落ちておちNeutralA noun for slips or errors in one's work, as in 「こちらの手落ち」; it stresses omissions and mistakes, while 「怠慢」 stresses laziness and failing one's duty.
• Related手抜きてぬきNeutralCutting corners or skimping on steps that should be done; common in speech, and unlike 「怠慢」 it is always deliberate.
• Related為落とししおとしNeutralA noun for parts left out or left blank in documents and other writing; little used, and focused on omissions rather than neglect of duty.
• Related為落ちしおちNeutralA noun for forgetting what one should do and the failures that result; little used — in daily speech 「手落ち」 is the usual word.
• Related遺漏いろうWrittenWritten word for omissions in work or documents, as in 「遺漏なきよう」; carries an official-document flavor.
• Related手抜かりてぬかりNeutralA noun for lapses from inattention, as in 「手抜かりがない」; a concrete oversight rather than the broader shirking that 「怠慢」 suggests.
• RelatedやりっぱなしCasualColloquial word for leaving things half-done, or done but not cleaned up or put away afterwards.
• Antonym勤勉きんべんWrittenAntonym: diligence and hard work, as in 「勤勉な学生」; the direct opposite of 「怠慢」.
• Antonym精勤せいきんWrittenWritten-style antonym: diligent, unwavering work or study with no absences; also used for good attendance; the opposite of 「怠慢」.

Use 「怠慢」 for lazily failing to do what one must, as in 「職務怠慢」. For slips or errors in work choose 「手落ち」, for cutting corners 「手抜き」, for leaving things unattended 「なおざり」, and for care or management falling short 「不行き届き」. 「怠り」 is a near-synonym; the written 「緩怠」 and 「疎慢」 are rare. The opposite is 「勤勉」.

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

1. しなければならないことを怠なまけること。