n. 永久;永恒;永远
拆分: per-贯穿→始终如一 + -pet-寻求→主动和持续 + -u- + -ity名词词尾,性质
短语:in perpetuity 永远,永久
例:They do not own the land in perpetuity. 他们并不是永久拥有这片土地。 The plots where they were buried were dedicated in perpetuity to the United States. 埋葬他们的那几块墓地已永远奉献给了美国。
