鋭敏|えいびんeibin[0]heiban (flat)

1. na-adjective, nounsharp (eyes, ears, etc.); keen; acute; sensitive
   目めが見みえない人ひとの聴力ちょうりょくは鋭敏えいびんな場合ばあいが多おおい。↗

   A blind person's hearing is often very acute.
2. na-adjective, nounsharp-witted; shrewd; clever; astute; acute

• Synonym鋭いするどいNeutralThe most versatile word, covering sharp blades as well as keen senses, as in 「鋭い質問」; 「鋭敏」 is more written in tone and covers only senses and mind, never blades.
• SynonymシャープNeutralA loanword for crisp outlines and a sharp mind, also the musical sharp sign, as in 「シャープな印象」. 「鋭敏」 leans toward keen sensory perception.
• Synonym敏感びんかんNeutralDescribes reacting easily to stimuli, including allergies, as in 「敏感肌」. 「鋭敏」 points to outstanding powers of perception and judgement.
• Synonym聡明そうめいWrittenWritten style for wisdom and good sense, leaning to overall intelligence. 「鋭敏」 leans to sharpness of reaction and perception.
• SynonymセンシティブNeutralA loanword for being psychologically sensitive and easily moved, also for sensitive topics. 「鋭敏」 refers to the ability of sharp senses and a quick mind.
• Related鋭利えいりWrittenWritten style, chiefly for sharp blades, as in 「鋭利な刃物」. 「鋭敏」 is never used of blades, only of the senses and the mind.
• Related英明えいめいFormalFormal, praising outstanding judgement, often a leader's decisions. 「鋭敏」 leans to quick senses and a quick mind.
• RelatedさといWrittenWritten style, for sharp ears and eyes and quick wits, often in set phrases like 「耳聡い」 or 「利に聡い」. 「鋭敏」 applies broadly to both senses and mind.
• Related明敏めいびんWrittenWritten style for a sharp, quick-understanding mind, used only of intellect. 「鋭敏」 can also describe senses such as smell and hearing.
• Related慧眼けいがんWrittenWritten style for the eye that sees to the essence of things, mostly a noun, as in 「慧眼の持ち主」. 「鋭敏」 describes senses or the mind in general.
• Related怜悧れいりWrittenWritten style for a clever, quick mind, used only of intellect. 「鋭敏」 can also praise the acuity of the senses.
• Related犀利さいりWrittenWritten and fairly rare; describes sharp blades and weapons as well as a keen intellect. 「鋭敏」 does not describe blades.
• Related穎敏えいびんWrittenA rare written word for a quick mind, homophonous with 「鋭敏」. It covers the mind only, not the senses, and 「鋭敏」 is the easier, more usual spelling.
• Related敏びんWrittenWritten style for quickness and agility, mostly a combining element in 「機敏」「敏腕」; rarely used alone. 「鋭敏」 stands on its own as a na-adjective.
• Related俊敏しゅんびんWrittenWritten style for quick wits paired with nimble movement, leaning to physical agility. 「鋭敏」 leans to the senses and the mind.
• Related慧敏けいびんWrittenA rare written word for cleverness with quick, accurate judgement, used only of the mind. 「鋭敏」 can also describe the senses.
• Related抜け目ないぬけめないCasualColloquial, for shrewdness that lets no chance slip by, often with a hint of cunning. 「鋭敏」 is a compliment with no negative shade.
• Antonym鈍感どんかんNeutralDull senses and insensitivity, also an inability to read people's feelings — the direct opposite of the sharpness of 「鋭敏」.
• Antonym魯鈍ろどんWrittenWritten style for stupidity and dullness of mind, the opposite of the quickness of 「鋭敏」.

「鋭敏」 is the written-style word for sharp senses or a quick mind, as in 「鋭敏な嗅覚」; in speech 「鋭い」 is the default. Use 「敏感」 for reacting easily to stimuli, 「センシティブ」 for emotional sensitivity or touchy topics, and 「抜け目ない」 for shrewdness with a hint of cunning. In writing, 「明敏」「聡明」「英明」 and the rarer 「怜悧」「穎敏」「慧敏」 speak of intellect; 「鋭利」 is mainly for blades, while 「犀利」 covers both blades and a keen mind; 「俊敏」 adds agility; 「聡い」 lives in set phrases like 「耳聡い」. The antonyms are 「鈍感」 and, in formal prose, 「魯鈍」.

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

1. 感覚かんかくが鋭するどいこと。また、そのさま。
2. 頭あたまの回転かいてんが速はやいこと。また、そのさま。