warm (someone/something) up
phrasal verb with warm verb [ I or T ] uk/wɔːm/ us/wɔːrm/
变热;(使)暖和;加热
to become warmer or to make someone or something warmer
The house soon warms up with the heating on. 暖气一开,屋子里很快就暖和起来了。
I'll just warm up the engine while you're getting your coats on. 你们穿上大衣,我去预热一下发动机。