陰湿|いんしつinshitsu[0]heiban (flat)

1. na-adjective, nounmalicious; spiteful; vicious; wicked; devious; underhanded; sly
   中学ちゅうがく・高校こうこうでは陰湿いんしつないじめが増ふえる傾向けいこうにあるという。↗

   In junior high and high schools, they say insidious forms of bullying are on the rise.
2. na-adjective, nounshady and damp

• Synonym陰険いんけんNeutralClose to 「陰湿」: outwardly pleasant but malicious inside. 「陰湿」 stresses dark, persistent methods, as in 「陰湿ないじめ」.
• Related湿っぽいしめっぽいNeutralMeans damp or a mawkish mood. 「陰湿」 can also mean dark and damp, but adds a spiteful sense 「湿っぽい」 lacks.
• RelatedうっとうしいNeutralFor gloomy, irritating things like weather or people; no malice implied. 「陰湿」 carries a spiteful, malicious nuance.
• Related憂鬱ゆううつNeutralDescribes one's own depressed mood. 「陰湿」 refers to malicious behavior or a damp, dark environment, not your feelings.
• Related陰気いんきNeutralA gloomy personality or atmosphere. 「陰湿」 goes further with a malicious edge, or means dark and damp.
• Related重苦しいおもくるしいNeutralHeavy, oppressive atmospheres or moods; the stress is on the oppressive feel. 「陰湿」 stresses spite or dampness.
• Related後ろ暗いうしろぐらいNeutralAbout having a guilty conscience or something to hide; 「陰湿」 describes underhanded methods or a dark, damp setting, not a guilty conscience.
• Related陰鬱いんうつWrittenWritten/formal word for a gloomy atmosphere or mood. 「陰湿」 instead stresses spitefulness or dark, damp surroundings.
• Related陰気くさいいんきくさいCasualColloquial: a dreary, dispiriting atmosphere, with a dismissive tone. 「陰湿」 implies malice, or a damp environment.
• Related陰々滅々いんいんめつめつWrittenLiterary: describes a bleak, dispiriting atmosphere. 「陰湿」 refers to underhanded methods or a dark, damp setting.
• Related気鬱きうつWrittenWritten/formal: a depressed, heavy state of mind. 「陰湿」 is not about moods but about methods or the environment.
• Related暗鬱あんうつWrittenWritten/formal: gloomy moods or scenes, with no malice. 「陰湿」 adds a spiteful, malicious nuance.
• RelatedグルーミーNeutralLoanword for gloomy and dreary, used rarely; no malice. 「陰湿」 carries a spiteful sense.
• Related辛気臭いしんきくさいCasualColloquial (Kansai flavor): dreary and irritating. 「陰湿」 means spiteful or malicious, without the irritating nuance.
• Related沈鬱ちんうつWrittenWritten/formal: a melancholy, downcast mood. 「陰湿」 is not about moods but about methods or the environment.
• Antonym明朗めいろうWrittenAntonym: a cheerful character, or open and fair conduct — the latter sense opposes 「陰湿」's underhandedness.
• Antonym陽気ようきNeutralAntonym: a cheerful, lively personality or lively atmosphere; opposes the gloomy air of 「陰湿」, not its malicious sense.

Use 「陰湿」 for underhanded, persistent malice, as in 「陰湿ないじめ」, or for dark, damp places. For hidden malice behind a pleasant surface choose 「陰険」; for a merely gloomy atmosphere 「陰気」; for a depressed mood 「憂鬱」. The other words cover gloom without malice: 「鬱陶しい」, 「重苦しい」, 「湿っぽい」; written ones include 「陰鬱」, 「気鬱」, 「暗鬱」, 「沈鬱」, 「陰々滅々」; colloquial 「陰気くさい」, 「辛気臭い」; antonyms 「明朗」, 「陽気」.

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

1. 日ひが当あたらず、暗くらくて湿しめっぽいこと。
2. 陰気いんきで気持きもちをはればれとさせないこと。
3. 日ひが当あたらず、暗くらくて湿しめっぽい。
4. 陰気いんきで気持きもちをはればれとさせない。