Associations to the word «Insidious»

Wiktionary

INSIDIOUS, adjective. Producing harm in a stealthy, often gradual, manner.
INSIDIOUS, adjective. Intending to entrap; alluring but harmful.
INSIDIOUS, adjective. (nonstandard) Treacherous.

Dictionary definition

INSIDIOUS, adjective. Beguiling but harmful; "insidious pleasures".
INSIDIOUS, adjective. Intended to entrap.
INSIDIOUS, adjective. Working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison".

Wise words

Words are always getting conventionalized to some secondary meaning. It is one of the works of poetry to take the truants in custody and bring them back to their right senses.
William Butler Yeats