UNACCUS'TOMED, adjective 1. Not accustomed; not used; not made familiar; not habituated; as a bullock unaccustomed to the yoke. Jeremiah 31:18. 2. New; not usual; not made familiar; as unaccustomed air; unaccustomed ideas.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI