adjective
Not true to duty or obligation
Synonyms: false, cowardly, faithless, disloyal, craven, unfaithful, apostate, mean-spirited, renegade, traitorous, perfidious, treacherous, spiritless, untrue, base, low, cowering, yielding, afraid, hesitant, timorous, betrayer, false-hearted, erring, coward, timid, fearful, dastardly, skulking, sneaking, weak-minded, deserter, pigeonhearted, unmanly, falsehearted, arrant, defecting, vile, pusillanimous, traitor, yellow
Antonyms: brave, courageous, loyal
noun
A person who has defected
Synonyms: apostate, deserter, renegade, turncoat, defector, poltroon, runagate, tergiversator, rat, ratter, craven