Definition of disaccustomed in English:

disaccustomed

Pronunciation /ˌdɪsəˈkʌstəmd/

adjective

  • No longer accustomed or habituated to something. Formerly also: †no longer customary or familiar (obsolete).

Origin

Late 16th century; earliest use found in Philip Sidney (1554–1586), author and courtier. Probably partly from dis- + accustomed.