詳しい・精しい・委しい|くわしいkuwashii[3]nakadaka (mid-high)

1. i-adjectivedetailed; full; minute
   もっと詳くわしい情報じょうほうが欲ほしい。↗

   I want more detailed information.
2. i-adjectiveknowing very well; knowledgeable (about); well-acquainted (with); well-informed (about); familiar (with)
   このあたりはお詳くわしいですか。↗

   Are you familiar with this area?

• Synonym詳細しょうさいNeutralNoun and na-adjective meaning details or detailed, as in 「詳細は後日」; it leans formal and written, and unlike 「詳しい」 it cannot mean being familiar with something.
• Synonym細かいこまかいNeutralMeans small, fine or trivial, and can describe someone fussy over trifles (「細かい人」); it has no sense of being familiar with something.
• Synonym綿密めんみつWrittenWritten/formal prose for airtight thoroughness, as in 「綿密な計画」; used mostly of plans and investigations.
• Synonym細密さいみつWrittenWritten/formal prose for extreme fineness of detail, as in 「細密画」; used mostly of pictures and descriptive writing.
• Synonym事細かことこまかNeutralExhaustive to the last detail, as in 「事細かに説明する」; mostly used adverbially, stressing that no detail is skipped.
• Synonym詳密しょうみつWrittenA rare written/formal word for detail and thoroughness; in everyday speech say 「詳しい」 or 「詳細」.
• SynonymつまびらかWrittenWritten/formal word with an elegant air; often in 「詳らかにする」, to bring the details to light.
• Related丹念たんねんNeutralDoing something with painstaking care, as in 「丹念に調べる」; stresses a careful attitude, where 「詳しい」 stresses detailed content.
• Related入念にゅうねんNeutralTaking extra care, as in 「入念な準備」; the point is not to overlook anything.
• Related念入りねんいりNeutralCareful and thorough, as in 「念入りに掃除する」; more colloquial than 「入念」.
• Related精緻せいちWrittenWritten/formal prose for fine and ingenious work, as in 「精緻な分析」; mostly of expository writing and crafts.
• Related精密せいみつNeutralPrecise and free of error, as in 「精密機械」 or 「精密検査」; the emphasis is on accuracy.
• Related緻密ちみつNeutralMeticulous and rigorous, as in 「緻密な計算」; also of a fine, close texture. The emphasis is on leaving no oversights.
• Related厳密げんみつNeutralStrict and exact, as in 「厳密に言えば」; the emphasis is on allowing no vagueness.
• Antonym粗いあらいNeutralCoarse or rough, as in 「目が粗い」; the opposite of the fine detail of 「詳しい」.
• Antonym大まかおおまかNeutralRough and broad-brush, as in 「大まかな計画」; the opposite of the exhaustive detail of 「詳しい」.

Use 「詳しい」 for detailed content or for knowing something well. In written contexts 「詳細」 can replace it for detailed content, but not for the familiar sense. For airtight plans use 「綿密」 or 「緻密」, for precision 「精密」, for a careful approach 「丹念」 or 「念入り」, and for something rough and broad, 「大まか」.

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

1. 委細いさいに立ち入たちいった様子ようす。詳細しょうさいである。こまかい。
2. 説明せつめいなどが細こまかいところまでなされている様子ようす。詳細しょうさいである。
3. 細部さいぶにわたって知識ちしきが行き届いきとどいている様子ようす。細こまかい点てんまで理解りかいしている様子ようす。精通せいつうしている。