inconstancy

1 lack of faithfulness especially to one's husband or wife a wife who was long inured to the chronic inconstancy of her husband Synonyms disloyalty, faithlessness, falseness, falsity, infidelity, perfidiousness, perfidy, unfaithfulnessRelated Words adultery; betrayal, double-cross, double-dealing, duplicity, sellout, treachery, treason; deceit, deception, lyingNear Antonyms staunchness, steadfastness; dependability, reliability; honesty, trustworthinessAntonyms allegiance, constancy, devotedness, devotion, faith, faithfulness, fealty, fidelity, loyalty

2 the frequent and usually sudden passing from one condition to another the inconstancy of public opinion is such that today's hero may be tomorrow's punching bag Synonyms change, fluctuation, flux, oscillationRelated Words metamorphosis, mutation, transformation, transmogrification, transmutation; vacillation, wavering