English

inconstantness

From inconstant + -ness.

Formed from inconstant + -ness

Proto-Italic *komstaēō ‘to stand together’

…

Latin cōnstāns ‘standing firm, unchangeable’

Latin incōnstāns ‘changeable’

Middle French inconstant

Middle English inconstant

Today it means

noun Quality of being inconstant.

Language periods are conventional ranges, not dates for this word.

Etymograph / inconstantness