INSIDIOUS


Meaning of INSIDIOUS in English

[ ɪn'sɪdɪəs ]

■ adjective proceeding in a gradual, subtle way, but with harmful effects.

Derivatives

~ly adverb

~ness noun

Origin

C16: from L. insidiosus 'cunning'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.