English
insolentness
From insolent + -ness.
Formed from insolent + -ness
Latin solēre ‘to be accustomed, to be wont’
Latin īnsolēns ‘unaccustomed, unwanted, unusual, immoderate,…’
English insolent
Today it means
noun Quality of being insolent.
Language periods are conventional ranges, not dates for this word.
Etymograph / insolentness