What does "inconstancy" mean?

Lack of constancy; lack of consistency in thought, emotion or action.

What is a synonym for "inconstancy"?

Common synonyms include: fickleness, ambitendency, ambivalence, arrhythmia, bad faith, barratry.

noun

noun ·4 syllables ·Moderate ·High school level

Noun

1
Lack of constancy; lack of consistency in thought, emotion or action. countable, uncountable
"Although she loved him for many years, his inconstancy eventually drove her to another."
2
the quality of being changeable and variable wordnet
3
unfaithfulness by virtue of being unreliable or treacherous wordnet

"We are all bewildered by her inconstancy."

From in- + constancy or inconstant + -cy.