-ency

剑桥词典

used to form nouns showing a state or quality
（用於搆成名詞，表示狀況或性質）
her long presidency (= time during which she was president ) 她漫長的縂裁任期
a difficult pregnancy (= time during which a woman is pregnant ) 艱辛的十月懷胎 返回 -ency