adjective. Changing or varying, especially often and without discernible pattern or reason.

adjective. Fickle; faithless.

Not constant; subject to change; not firm; unsteady; fickle; capricious: said chiefly of persons: as, inconstant in love or friendship.

Synonyms Unstable, vacillating, wavering, volatile, unsettled, uncertain.

adjective. Not constant; not stable or uniform; subject to change of character, appearance, opinion, inclination, or purpose, etc.; not firm; unsteady; fickle; changeable; variable; -- said of persons or things.

adjective. Not constant; wavering.

adjective. likely to change frequently often without apparent or cogent reason; variable

"Mark Twain and Will Rogers lived off the foibles of Congressmen who they described as inconstant, untrustworthy, mendacious, venal, etc, etc."

false  fickle  untrue  volatile  

changeable  crotchety  desultory  erratic  faithless  

adrift  afloat  alternating  amorphous  brittle