Dictionary 1. (v. t.) To familiarize by use or habit; to habituate; as, to accustom oneself to humid weather\.2. (v. i.) To be wont. 3. (v. i.) To cohabit. 4. (n.) Custom. Thesaurus acclimatize accommodate accustom adapt adjust break break in case harden condition confirm domesticate domesticize establish familiarize fix gentle habituate harden housebreak inure naturalize orient orientate season tame toughen train wont |