unexperienced, a. [inexperienced], unpracticed.
unexplainable, a. inexplicable, [inscrutable], uninterpretable.
unexpressible, a. [inexpressible], [unutterable], ineffable.
unextinguishable, a. [unquenchable], insuppressible.
unfading, a. [perennial], amaranthine, [permanent], [enduring].
Unfailing, a. [sure], [certain], [constant], [inexhaustible], [infallible], inevitable.
unfair, a. [unjust], [partial], [unconscionable], inequitable, disingenuous.
unfairness, n. [injustice], inequity, [partiality].
unfaithful, a. [disloyal], [faithless], [perfidious], [undutiful], [renegade], [apostate], [recreant], [derelict], [false], [treacherous], [traitorous], treasonable, untrustworthy, [pervert], [inconstant], [unsteadfast], [fickle].
unfaithfulness, n. [disloyalty], [perfidy], [apostasy], [recreancy], [inconstancy], [treachery], treason, bad [faith], dereliction, [fickleness], defection.