陰湿いんしつ
inshitsu

Noun
na-Adjective

1. malicious; 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える傾向けいこうにあるという。
chūgaku·kōkōdewa inshitsuna ijimega fueru kēkōni aruto iu.
In junior high and high schools, they say insidious forms of bullying are on the rise.
Noun
na-Adjective

2. shady and damp