means Excessive self-absorption, vanity, and a need for admiration — in clinical use, a personality pattern marked by grandiosity and a striking lack of empathy.

from From Narcissus, the beautiful youth of Greek myth who caught sight of his own reflection in a pool and fell so hopelessly in love with it that he couldn't look away, wasting there until he died — and, in some tellings, became the flower that still bears his name. The Greek name Narkissos may be linked to narkē, 'numbness' (the same root behind 'narcotic'), perhaps hinting at the trance that held him. The clinical term was lifted from the myth in the late 19th century by early psychologists and cemented by Freud.