INCONSTANT

inconstant

(adjective) likely to change frequently often without apparent or cogent reason; variable; “inconstant affections”; “an inconstant lover”; “swear not by...the inconstant moon”- Shakespeare

Source: WordNet® 3.1

Etymology

Adjective

inconstant (comparative more inconstant, superlative most inconstant)

Not constant; wavering.

Unfaithful to a lover.

Source: Wiktionary

In*con"stant, a. Etym: [L. inconstans: cf. F. inconstant. See In- not, and Constant.]

Definition: 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.

Syn.

– Mutable; fickle; volatile; unsteady; unstable; changeable; variable; wavering; fluctuating.

Source: Webster’s Unabridged Dictionary 1913 Edition