軽率・軽卒|けいそつkeisotsu[0]heiban (flat)

1. na-adjective, nounrash; thoughtless; careless; hasty; imprudent
   あの連中れんちゅうは軽率けいそつで、仕事しごとがのろかったから、くびになった。↗

   They got the sack for being careless and tardy.

• Synonym軽々しいかるがるしいNeutralAn adjective for treating things too lightly or casually — 「軽々しく口にするな」, 「軽々しい発言」.
• Synonym軽はずみかるはずみNeutralA noun for offhand, rash words or acts, as in 「軽はずみな発言」; colloquial, and the closest match to 「軽率」.
• Synonym不心得ふこころえWrittenA noun, mostly written, for misconduct or ignorance of proper behavior, as in 「不心得者」; the failing is moral.
• SynonymそそっかしいCasualA colloquial adjective for a hasty, scatterbrained person — 「そそっかしい人」; points to a careless character.
• Synonym不謹慎ふきんしんWrittenCovers remarks that are not serious or are out of place on the occasion, as in 「不謹慎な発言」.
• Synonymいい加減いいかげんCasualA common colloquial word for perfunctory, halfhearted responses, as in 「いい加減な返事」.
• Synonym軽忽きょうこつWrittenWritten word for rashness and negligence; rare — say 「軽率」 or 「うかつ」 instead.
• Synonym無分別むふんべつWrittenA noun, mostly written, for acting without sense or judgment, as in 「無分別な行動」; the failing is lack of judgment.
• SynonymうかつNeutralCovers careless oversights, as in 「うかつだった」; often used when regretting a slip after the fact.
• Synonym無考えむかんがえCasualA colloquial noun for acting without thinking, as in 「無考えな行動」; used less often.
• Synonym粗忽そこつNeutralNames carelessness or a blundering slip itself; the person is a 「粗忽者」. It leans written and is typical of rakugo comedy.
• Synonym無思慮むしりょWrittenA noun, mostly written, for words and deeds made without reflection, as in 「無思慮な言動」.
• Related不注意ふちゅういNeutralA noun for lapses in attention or negligence, as in 「不注意による事故」 and 「管理の不注意」.
• Related無謀むぼうNeutralCovers reckless ventures that ignore the consequences, as in 「無謀な計画」.
• RelatedやたらCasualA colloquial adverb for doing things indiscriminately or to excess, as in 「やたらに高い」.
• Related愚かおろかNeutralMeans simply foolish, as in 「愚かな行為」; it condemns the idea or act itself rather than the haste.
• Related軽薄けいはくWrittenA written word for frivolity, as in 「軽薄な男」; it can describe people or their words and conduct, and stresses a flighty, insincere manner rather than haste.
• RelatedむやみNeutralCovers doing things indiscriminately, as in 「むやみに使う」; the point is lack of restraint.
• Related卒爾そつじWrittenA written word for abruptness, as in 「卒爾ながら」; old-fashioned and hardly used today.
• RelatedちゃらんぽらんCasualColloquial for a slapdash, devil-may-care character — 「ちゃらんぽらんな性格」; carries a critical tone.
• Related向こう見ずむこうみずNeutralA noun for headlong, foolhardy types, as in 「向こう見ずな若者」; the point is disregarding danger.
• RelatedむやみやたらCasualA colloquial set phrase, an intensified 「無闇」, for acting without any restraint — 「むやみやたらに買う」.

Use 「軽率」 as the default for acting or speaking without due thought — 「軽率な判断」, 「軽率な発言」. In speech, 「軽はずみ」 is the closest everyday alternative. Reach for 「うかつ」 when regretting a careless slip afterwards, 「不謹慎」 for remarks out of place on the occasion, and 「無謀」 for reckless ventures that ignore the consequences. Others are narrower: 「不注意」 for lapses of attention, 「向こう見ず」 for ignoring danger, 「無闇」 for lack of restraint, 「いい加減」 for perfunctory attitudes.

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

1. 物事ものごとをよく考かんがえないで行おこなう様子ようす。慌あわててことを行おこなうさま。
2. 思慮しりょ分別ぶんべつの足たりない性格せいかくや状態じょうたいそのもの。