-ency
suffix (also -ancy) uk/ -ən.si/ us/ -ən.si/
（用于构成名词，表示状况或性质）
used to form nouns showing a state or quality
her long presidency (= time during which she was president) 她漫长的总裁任期
a difficult pregnancy (= time during which a woman is pregnant) 艰辛的十月怀胎