親密|しんみつshinmitsu[0]heiban (flat)

1. na-adjective, nounintimacy; friendship
   ついに彼かれらの友情ゆうじょうが壊こわれ、二人ふたりの親密しんみつな関係かんけいは消え失きえうせた。↗

   Finally, their friendship ended and their close relationship disappeared.

• Synonym気安いきやすいNeutralDescribes being able to mix with someone freely and without reserve; stresses the relaxed feeling, and can also imply overfamiliarity.
• Synonym親しいしたしいNeutral「親しい」 also covers people who are close to you, like relatives and friends. Much like 「親密」 but with a softer tone.
• Synonym懇意こんいWrittenSays two people are on good, familiar terms, as in 「懇意にしている」. Leans toward written/formal prose.
• Synonym親交しんこうNeutralA noun for close association or friendship itself; 「親密」 is a na-adjective describing the state of the relationship.
• Synonym懇親こんしんNeutralRefers to friendly mingling and socializing; mostly seen in 「懇親会」 (a social gathering).
• Synonym仲良しなかよしCasualColloquial and affectionate. Covers being on good terms and also the good friend or friends themselves.
• SynonymねんごろWrittenWritten/formal prose. Covers both attentive, courteous treatment and a close relationship, but sounds old-fashioned; 「親密」 is the more common choice.
• Synonym近しいちかしいNeutralRefers to a close relationship, as in 「近しい間柄」. Close in sense to 「親密」 but with a native-Japanese (wago) flavor.
• Synonym昵懇じっこんWrittenWritten/formal prose with an archaic flavor. Says a friendship is very deep, as in 「昵懇の間柄」.
• Synonym心安いこころやすいNeutralDescribes being well acquainted enough to skip formalities; somewhat old-fashioned in tone and stresses the relaxed, informal feel.
• Synonym交情こうじょうWrittenRare in writing. Refers to the affection that grows out of associating with someone over time.
• SynonymよしみNeutralMeans friendship or a bond of goodwill between people; mostly in the pattern 「…のよしみで」.
• Synonym親近しんきんNeutralMeans feeling drawn to someone or warming to them; mostly seen in 「親近感」 (a sense of affinity).
• Synonym昵近じっきんWrittenRare in writing. Refers to the degree to which people know each other well and associate closely.
• Synonym親しさしたしさNeutralA noun for the feeling of closeness or affection; 「親密」 describes the state of the relationship itself.
• Synonym爾汝の交わりじじょのまじわりWrittenA set phrase, rare in writing, for a friendship so close the two drop honorifics and address each other familiarly.
• Related親身しんみNeutralDescribes caring for someone as though they were family, as in 「親身になって相談に乗る」.
• Related親しみやすいしたしみやすいNeutralDescribes someone easy to approach and get along with; stresses the impression the person gives, not the relationship itself.
• Related親しみ深いしたしみぶかいNeutralDescribes someone kind and friendly who makes you feel warm; stresses the person's attitude rather than the closeness of the relationship.
• Related懇篤こんとくWrittenRare in writing. Describes warm, sincere treatment of others; stresses attitude, while 「親密」 refers to closeness of the relationship.
• Related身近いみぢかいNeutralAn adjective meaning near at hand and familiar; not often used. The common 「身近な」 is the prenominal form of the na-adjective 「身近だ」.
• Antonym疎遠そえんNeutralAntonym: a relationship that has grown distant, with little contact between the two sides.
• Antonym険悪けんあくNeutralAntonym: describes strained relations or a tense, hostile atmosphere.

Use 「親密」 for close personal or international relations, as in 「親密な関係」. In everyday conversation, 「仲がいい」 and 「親しい」 are the natural ways to say two people get along, while 「親交」 names the friendly association itself. Many alternatives here are written or old-fashioned. The opposites are 「疎遠」 and 「険悪」.

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

1. 親したしい関係かんけいにある様さま。