say it: uhn-uh-KUH-stuhmd
unaccustomed is an adjective meaning "unusual or unfamiliar". It carries one recorded sense.
unusual or unfamiliar
“an unaccustomed pleasure”
“many varieties of unaccustomed foods”
“a new budget of unaccustomed austerity”
Definitions, synonyms and semantic relations for unaccustomed come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.