adjective SYNONYMY NOTE: faithless implies failure to adhere as to an oath or obligation [a faithless wife]; false, in this connection more or less synonymous with , faithless, stresses failure in devotion to someone or something that has a moral claim to one's
support [a false friend]; disloyal implies a breach of allegiance to a person, cause, institution, etc. [disloyal to one's family]; traitorous strictly implies the commission of treason; , treacherous suggests an inclination or tendency to betray a trust [his treacherous colleagues]; perfidious adds to the meaning of , treacherous a connotation of sordidness or depravity [a perfidious informer] 1.
not keeping faith; dishonest; disloyal
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'faithless'ME feithles