Insidious meaning: Insidious means working or spreading harmfully in

Insidious means working or spreading harmfully in a subtle or stealthy manner, or intended to entrap or beguile. Find out the origin, usage, and translations of this adjective, and see examples and related words. Master the word " INSIDIOUS " in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource. The adjective ' insidious ' has its roots in Latin, originating from the word 'insidiosus,' which means 'cunning' or 'treacherous.' This Latin term is derived from 'insidiae,' which refers to 'ambushes' or 'traps.' The word 'insidiae' itself has connections to 'insidere,' meaning 'to sit in' or 'to lie in wait.' Therefore, ' insidious ' carries the etymological idea of something lying in wait or working secretly to deceive or harm. In its modern usage, ' insidious ' describes things that are ... insidious (comparative more insidious , superlative most insidious ) Causing harm in a stealthy, often gradual, manner. synonym quotations Synonym: subtle