insidious
意味
- 人をだます,陰険な
- (病気など)潜行性の
例文
In junior high and high schools, they say insidious forms of bullying are on the rise.
中学・高校では陰湿ないじめが増える傾向にあるという。
語源
英語の原文（Wiktionary）
From Middle French insidieux, from Latin īnsidiōsus (“cunning, artful, deceitful”), from īnsidiae (“a lying in wait, an ambush, artifice, stratagem”) + -ōsus, from īnsideō (“to sit in or on”), from in (“in, on”) + sedeō (“to sit”).