Definify.com
Webster 1913 Edition
Perfidiously
Per-fid′i-ous-ly
,adv.
In a perfidious manner.
Webster 1828 Edition
Perfidiously
PERFID'IOUSLY
,adv.
Definition 2024
perfidiously
perfidiously
English
Adverb
perfidiously (comparative more perfidiously, superlative most perfidiously)
- In a perfidious manner.