inconstant

/(ˌ)in-ˈkän(t)-stənt/

Middle English, from Middle French, from Latin inconstant-, inconstans, from in- + constant-, constans constant

adjective

  1. likely to change frequently without apparent or cogent reason

inconstant fickle capricious mercurial unstable mean lacking firmness or steadiness (as in purpose or devotion). inconstant implies an incapacity for steadiness and an inherent tendency to change. fickle suggests unreliability because of perverse changeability and incapacity for steadfastness.