鈍い|にぶいnibui[2]nakadaka (mid-high)

1. i-adjectivedull (e.g. a knife); blunt
2. i-adjectivethickheaded; obtuse; stupid
   確たしかに彼かれは少々しょうしょうにぶいが勤勉きんべんだ。↗

   Indeed he may be a little dull, but he is diligent.
3. i-adjectivedull (sound, color, etc.); dim (light)
4. i-adjectiveslow; sluggish; inert; lethargic
5. i-adjectiveinsensitive; dull (e.g. reflexes); unperceptive; unfeeling

• Synonym緩慢かんまんWrittenWritten: slow movement or change; 「鈍い」 focuses on dullness.
• RelatedのろまCasualA colloquial noun for someone slow-moving, slow to react or not sharp, with a pejorative tone; 「鈍い」 is an adjective.
• RelatedスローNeutralA loanword for low speed; 「鈍い」 focuses on dulled reactions or senses.
• RelatedどんくさいCasualColloquial with a Kansai flavor: clumsy, slow to react. 「鈍い」 also covers dull blades and dim light.
• Related鈍臭いのろくさいCasualSame as the previous, written 「鈍臭い」: clumsy, slow, colloquial; 「鈍い」 can also describe a dull blade or dim light.
• RelatedとろいCasualColloquial: slow in movement or thinking; 「鈍い」 also describes a blunt blade or a muffled sound.
• Related愚鈍ぐどんWrittenWritten: dull-witted, pejorative; 「鈍い」 is more everyday and also covers dulled senses.
• Related遅鈍ちどんWrittenWritten: slow to react; in everyday speech, 「鈍い」.
• Related魯鈍ろどんWrittenWritten: dim-witted, strongly pejorative; in everyday speech, 「鈍い」.
• Related鈍重どんじゅうWrittenPonderous, slow and heavy in action or thought; 「鈍い」 also describes dull blades and dim light.
• Antonym鋭いするどいNeutralThe opposite of 「鈍い」 in sharpness and acuity: sharp, keen.
• Antonym敏感びんかんNeutralThe opposite of 「鈍い」 in sensory acuity: sensitive.

Use 「鈍い（にぶい）」 for a blunt blade, slow reactions, a muffled sound or dim light. For clumsiness use 「鈍くさい」 or 「とろい」; in writing, 「愚鈍」. The opposites are 「鋭い」 and 「敏感」.

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

1. 刃物はものの切れ味きれあじが悪わるい。角度かくどが足たりない。
2. 感覚かんかくにとぼしい。頭あたまの回転かいてんが遅おそい。センスがない。痛いたみを感かんじにくい。
3. 光ひかりがぼやけている。
4. 通とおりにくい音おと、はっきりしない音おと