The apartment needs a complete fumigation before we move in.

fumigation 是由动词 fumigate（熏蒸消毒）加上名词后缀 -ion 构成的名词。fumigate 本身由词根 fum（烟、蒸汽）和动词后缀 -ate 组成，字面意思是"用烟熏处理"。fumigation 指"用化学气体熏蒸来消毒或杀虫的过程"。