also: ナルシズム
A loanword from English, used in psychology and everyday language to describe excessive self-admiration or self-centeredness.
彼のナルシシズムには呆れるよ。
I'm amazed by his narcissism.
SNSの普及でナルシシズムが強まる人もいる。
With the spread of social media, some people's narcissism intensifies.