軽々しい・軽軽しい|かるがるしいkarugarushii[5]nakadaka (mid-high)

1. i-adjectiverash; thoughtless; imprudent; careless; frivolous
   この問題もんだいは軽々かるがるしく扱あつかってはならない。↗

   This matter must not be trifled with.

• Synonym浅はかあさはかNeutralShallow, poorly thought out; stresses limited insight and is more damning than 「軽々しい」.
• Synonym不心得ふこころえWrittenWritten. Improper or rude conduct showing a lack of proper sense, as in 「不心得者」; stresses a faulty attitude.
• Synonym軽率けいそつNeutralThe most common of these words, at home in both speech and writing; very close in meaning to 「軽々しい」.
• Synonym軽薄けいはくNeutralFrivolous and shallow; stresses a person's lack of seriousness — more a character trait than 「軽々しい」.
• Synonym軽はずみかるはずみNeutralHasty, rash action taken without due thought; typically in phrases like 「軽はずみな行動」.
• Synonym無謀むぼうNeutralReckless and heedless of the consequences; stresses taking wild risks, stronger than 「軽々しい」.
• Synonym不謹慎ふきんしんWrittenWritten. Speech or behavior that is unseemly for the occasion, as in 「不謹慎な発言」; stresses impropriety.
• Synonym不見識ふけんしきWrittenWritten. Showing poor judgment that makes one look bad; stresses lack of discernment.
• SynonymそそっかしいCasualColloquial. A flustered, hasty character who is careless and often makes mistakes.
• Synonym上っ調子うわっちょうしCasualColloquial. Flippant and half-hearted; stresses a frivolous attitude.
• SynonymむやみCasualColloquial. Doing things indiscriminately or to excess, usually as 「むやみに」; stresses acting without restraint or moderation.
• Synonym心無いこころないNeutralInconsiderate and unkind; stresses wounding other people's feelings — harsher than 「軽々しい」.
• Synonym無分別むふんべつWrittenWritten and rare. Acting recklessly without judging right from wrong; stresses the lack of judgment.
• Synonym軽忽きょうこつWrittenWritten and rare, more literary than 「軽々しい」; also carries nuances of disdain or absurdity.
• Synonym不所存ふしょぞんWrittenWritten and rare. Behaving improperly because one has not thought things through; stresses insufficient forethought.
• Synonym無考えむかんがえNeutralRare. Acting without thinking; stresses doing things without using one's head.
• SynonymちゃらんぽらんCasualColloquial. Slapdash and irresponsible; more easygoing and careless than 「軽々しい」.
• Synonym卒爾そつじWrittenWritten and literary. Abrupt or hasty; stresses suddenness rather than rashness.
• Synonym軽躁けいそうWrittenWritten and rare. Flighty and restless; stresses inability to settle down and stay composed.
• Synonym無思慮むしりょWrittenWritten and rare. Thoughtlessness; close in sense to 「無分別」.
• SynonymうかつNeutralCareless through a momentary lapse of attention, as in 「迂闊なことは言えない」.
• Synonym軽佻浮薄けいちょうふはくWrittenWritten four-character idiom for frivolous, shallow conduct or a frivolous social climate.
• Synonym向こう見ずむこうみずCasualColloquial. Charging ahead without thought of the consequences; stresses impulsive, headlong recklessness.
• Synonym浮薄ふはくWrittenWritten and rare. Frivolous and fickle; stresses an insincere, unreliable character.
• Synonym軽佻けいちょうWrittenWritten and rare. Flippant; stresses flightiness and lack of composure.
• Antonym重々しいおもおもしいNeutralAntonym. Dignified and stately — the opposite of 「軽々しい」 speech and behavior.
• Antonym慎重なNeutralAntonym. Careful and deliberate; contrasts with 「軽々しい」, which suggests acting without thinking.

Use 「軽々しい」 for speech and actions that come too readily, as in 「軽々しく口にするな」. For general rashness the default is 「軽率」, the closest and most common match; 「軽はずみ」 fits hasty action. Pick 「浅はか」 for shallow thinking, 「心無い」 for hurting feelings, 「無謀」 or 「向こう見ず」 for recklessness, 「迂闊」 for a careless lapse, 「そそっかしい」 for a flustered character, 「軽薄」 for frivolity. The remaining written words (無分別, 軽忽, 不心得, 不所存, 卒爾, 軽躁, 無思慮, 不謹慎, 不見識, 軽佻浮薄, 浮薄, 軽佻) suit formal written prose. Antonyms: 「重々しい」 dignified, 「慎重な」 cautious.

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

1. 言動げんどうに慎重しんちょうさを欠かく様さま。軽率けいそつな。