The little girl cozied up to her mother to keep warm on the cold night.

cozied 是动词 cozy 的过去式，cozy 意思是"舒适、温暖地依偎"。cozy 本身也可以作形容词，表示"温暖舒适的"。 cozied up 是一个短语动词，表示"依偎、紧贴着某人或某物以获取温暖或舒适感"。