inconstancy

Definition of Inconstancy in English :

unfaithfulness by virtue of being unreliable or treacherous

2. changefulness, inconstancy

the quality of being changeable and variable

WordNet Lexical Database for English. Princeton University. 2010.

Inconstancy

adjective

1.

not constant; variable

2.

fickle

adjective

not constant; changeable

; specif.,

a.

not remaining firm in mind or purpose

b.

unsteady in affections or loyalties; fickle

c.

not uniform in nature, value, etc.; irregular; variable

n. pl. in·con·stan·cies

1. The state or quality of being eccentrically variable or fickle.

2. An instance of being eccentrically variable or fickle.