She held off buying a new car until she saved enough money.

held 是动词 hold 的过去式，hold 的基本意思是"握住、保持"。 off 在这里是副词，表示"推迟、延迟"的意思。 held off 是一个短语动词，意思是"推迟、延缓做某事"，指暂时不做某事直到某个条件满足。