D defs.my
Entry 1 sense Webster, 1913

Inconstancy

/ĭnˌ-kän'-stən-sē/ · In·con·stan·cy · IPA /ˌɪnkˈɑnstənsiː/
01 n. The quality or state of being inconstant; lack of constancy; mutability; fickleness; variableness.
  1. 1.
    The quality or state of being inconstant; lack of constancy; mutability; fickleness; variableness.
    “For unto knight there was no greater shame, Than lightness and inconstancie in love.” Spenser.