陰湿

• Reading: いんしつ
• Romaji: inshitsu
• Kanji breakdown: 陰 (in/kage) — shadow, hidden, dark; 湿 (shitsu/shime) — damp, moist
• Pronunciation: /iɴ.ɕi.tsɯ/

Meaning

Insidious; underhanded; malicious; persistently harmful. Describes behaviour that operates covertly and is difficult to confront directly.

A na-adjective with strong negative connotations, describing harassment or cruelty that works in the shadows rather than openly. The literal meaning encompasses darkness and dampness (陰 — dark, 湿 — damp), evoking something festering unseen. Particularly common in discussions of workplace bullying (パワハラ) and school bullying (いじめ).

Examples

1. 陰湿ないじめが続いていることが、学校側の調査で明らかになった。 A school investigation revealed that insidious bullying had been ongoing.
2. 彼の嫌がらせは陰湿で、証拠を残さないようにしているらしい。 His harassment is underhanded — he appears to be taking care not to leave any evidence.
3. 職場環境が陰湿になると、誰も声を上げられなくなってしまう。 Once a workplace turns insidious, nobody is able to speak up.

Usage Guide

Context: bullying, workplace, social issues, crime

Tone: critical

Origin & History

Sino-Japanese compound: 陰 (in — shadow, hidden, dark) + 湿 (shitsu — damp, moist). The combination evokes something lurking in dark, damp shadows — metaphorically, persistent malice that avoids the light.

Cultural Context

Era: Modern

Generation: Adult

Social background: General