death instinct

death-instinct的词性：
n.Psychiatry （名词）【精神病学】

1. A primitive impulse for destruction, decay, and death, manifested by a turning away from pleasure, postulated by Sigmund Freud as coexisting with and opposing the life instinct.Also called Thanatos
死亡本能：对毁灭、衰亡和死亡的原始冲动，表现方式为拒绝享乐。西格蒙德·弗洛伊德提出该假设，认为其与生命本能同时存在并与其相对立也作 Thanatos

2. Death wish.
死亡愿望