How to say "lax" in Japanese

• ルーズJLPT N1approx.Common
  na-adjectiveCovers the personal sense of 'lax': someone careless or undisciplined in their habits, especially with time, money, or keeping promises. Typical of a person who is lax about punctuality or repayment.
• 緩いゆるいJLPT N2approx.Common
  i-adjectiveUsed for 'lax' meaning not strict: rules, supervision, or discipline that are too lenient. It describes the rules or controls themselves rather than a person's everyday habits.
• 緩慢かんまんCommon
  na-adjective, nounApplies to 'lax' describing regulation or the handling of affairs — an institutional slackness rather than personal carelessness. It is not the word for a person who is lax about time or money.

Use 「ルーズ」 for a person who is careless or undisciplined about time, money, or promises; 「緩い」 for rules, supervision, or discipline that are not strict; and 緩慢 for slack regulation or handling of affairs.

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

• ルーズcareless (with something, esp. time, money, promises, etc.)
• 手ぬるいてぬるいlax
• 締まりのないしまりのないslack
• 緩いゆるいlenient
• 緩やかゆるやかlenient
• 緩慢かんまんlax (regulation, handling, etc.)
• ちょろいsoft
• 緩かゆるかlenient
• ずるずるloose