だらしないdarashinai

1. i-adjectiveslovenly (appearance, work, etc.); sloppy; untidy; undisciplined; careless; loose; slack
   それ以来いらい彼かれはだらしない生活せいかつをしてきた。↗

   He has led a loose life since then.
2. i-adjectiveweak; feeble; weak-willed; cowardly; gutless

• SynonymルーズNeutralLoanword for being lax about rules, especially time, money, and promises (「時間にルーズ」); also describes loose-fitting clothes.
• Synonym締まりのないしまりのないNeutralLacks tightness or firmness; covers expressions, physique, and a lax attitude or lifestyle (「締まりのない生活」). Overlaps heavily with 「だらしない」.
• SynonymぞろっぺいCasualColloquial and old-fashioned, meaning sloppy and overly casual; rarely used today. Say 「だらしない」 or 「いい加減」 in everyday speech.
• SynonymしどけないWrittenWritten/formal word for being unkempt or carelessly dressed (「しどけない姿」), with a languid, not necessarily negative nuance.
• Related粗雑そざつNeutralRough and careless in work or craftsmanship (「粗雑な仕事」「粗雑な扱い」); can also mean crude clothing. 「だらしない」 is about a person's lax lifestyle.
• Related放漫ほうまんWrittenWritten/formal term for lax management (「放漫経営」), used mainly in business or finance; not for personal appearance.
• Related散漫さんまんNeutralDescribes scattered attention or loose, unfocused content (「注意力散漫」); the point is a wandering, unfocused mind.
• Related無精ぶしょうNeutralLaziness from finding things a bother; also an unkempt look (「無精ひげ」). The core idea is not wanting to make an effort.
• Related乱雑らんざつNeutralCluttered and disordered (「部屋が乱雑」); also rough treatment (「乱雑な扱い」). 「だらしない」 is about a person's appearance and lifestyle.
• RelatedぞんざいNeutralCareless or offhand, and can be rude (「ぞんざいな言葉遣い」); focuses on the rough way something or someone is treated.
• Relatedいい加減いいかげんNeutralCommon everyday word for halfhearted, irresponsible behavior (「いい加減な返事」); the point is doing things perfunctorily.
• Related無計画むけいかくNeutralHaphazard because no plan was made (「無計画な旅」); about failing to plan ahead, with no link to appearance.
• RelatedちゃらんぽらんCasualColloquial for a devil-may-care, slapdash person (「ちゃらんぽらんな人」); stresses being irresponsible in one's conduct.
• RelatedしまらないNeutralSlack and lacking tension or focus (「締まらない話」); the point is an absence of firmness or snap.
• AntonymきちんとしたNeutralNeat, orderly, and proper; the opposite of 「だらしない」 in appearance and in the way one works.
• AntonymしっかりしたNeutralReliable and steady; the opposite of 「だらしない」 in character and willpower.

Use 「だらしない」 for a sloppy appearance, lifestyle, or attitude. For being lax about time, money, or promises pick 「ルーズ」; for careless, halfhearted work 「いい加減」; for a messy room 「乱雑」. The opposite is 「きちんとした」.

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

1. きちんとしていない。整ととのっていない。しまりがない（人ひとの身みなりや態度たいどについて）。