— faithlessly , adv.
/fayth"lis/ , adj.
1. not adhering to allegiance, promises, vows, or duty: the faithless behavior of Benedict Arnold.
2. not trustworthy; unreliable.
3. without trust or belief.
4. being without religious faith.
5. (among Christians) bereft of Christian faith.
[ 1250-1300; ME faithles. See FAITH, -LESS ]