noun
pleasure principle
In Freudian psychoanalysis, the instinctive drive to seek pleasure and avoid pain, governing the id.
フロイトによれば、快楽原則はイドの基本的な働きである。
According to Freud, the pleasure principle is the basic function of the id.
The reality principle, which modifies the pleasure principle by taking external reality into account.
Compound of 快楽 (pleasure) and 原則 (principle), likely a translation of the German 'Lustprinzip' or English 'pleasure principle' used in Freudian psychology.