[ adj ] likely to change frequently often without apparent or cogent reason; variable <adj.all> inconstant affectionsan inconstant lover swear not by...the inconstant moon
Inconstant \In*con"stant\, a. [L. inconstans: cf. F. inconstant. See {In-} not, and {Constant}.] 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; as, inconstant in love or friendship. ``The inconstant moon.'' --Shak.
While we, inquiring phantoms of a day, Inconstant as the shadows we survey! --Boyse.