different between inexpert vs unaccustomed

English

From in- +? expert.

inexpert (comparative more inexpert, superlative most inexpert)

Inept or unskilled; not of expert ability or quality.
Synonyms: amateurish, clumsy, bungling, maladroit
Antonyms: adept, proficient, professional, skillful

inexpert (plural inexperts)

un- +? accustomed

unaccustomed (comparative more unaccustomed, superlative most unaccustomed)

Not used to an event or thing, not accustomed.
- I again conveyed his key into his pocket, and counterfeiting sleep—though I never once closed my eyes, lay in bed till after he arose and went to prayers—an exercise to which I had long been unaccustomed.
He is unaccustomed to the cold.

unaccustomed

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