Synonyms and Antonyms for perfidiously

We couldn't find any exact matches, but here are some similar words.

1. perniciously (adv.)

in a noxiously baneful way


2. perniciously (adv.)

in a harmfully insidious manner


3. perfidious (adj.)

tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans

Synonyms: Antonyms: