In-cōn'stant, a.

a. [Prefix in, not, and constant; Fr. inconstant, Sp. inconstante, It. inconstante, incostante, Lat. inconstans.]

1. Not constant; subject to change of opinion, inclination, or purpose; not firm in resolution; unsteady; fickle; capricious; — said of persons; as, inconstant in love or friendship.
2. Changeable; variable; — said of things. “The inconstant moon.” Shak.

Syn.—Mutable; fickle; volatile; unsteady; unstable; changeable; variable.