unfaithful vs untrusty

unfaithful and untrusty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfaithful	No	Yes	No	No
untrusty	No	Yes	No	No

unfaithful (adjective)	untrusty (adjective)
not true to duty or obligation or promises	not worthy of trust or belief
having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend
having the character of, or characteristic of, a traitor
not trustworthy