From Wiktionary, the free dictionary
From אָנ־ (on-) + וואַרעמען (varemen). Compare German anwärmen.
אָנוואַרעמען • (ónvaremen) (past participle אָנגעוואַרעמט (ongevaremt))
- (perfective, transitive or intransitive) warm up, heat up
- וואַרעמען (váremen, “warm up (imperfective)”)
- וואַרעם (várem, “warm”, adjective)