per·fid·i·ous 
(pər-fĭdē-əs)
(pər-fĭdē-əs)adj.
Of, relating to, or marked by perfidy; treacherous. See Synonyms at faithless.
per·fidi·ous·ly adv.
- postmodernism
- postmodernist
- postmortem
- post mortem
- postmortem examination
- postnasal
- postnasal drip
- postnatal
- postnatally
- postnuptial
- postnuptially
- post office
- post office box
- post-op
- postop
- postoperative
- postoperatively
- postorbital
- postpaid
- postpartum
- post-polio syndrome
- postponable
- postpone
- postponement
- postpose