Nemesis (Greek: νέμεσις) is a philosophical term first created by Aristotle in his Nicomachean Ethics.
The term means one who feels pain caused by others' undeserved success.
It is part of a trio of terms, with epikhairekakia (ἐπιχαιρεκακία ) meaning one who takes pleasure in others' pain, similar to Schadenfreude, and phthonos (φθόνος) meaning one who feels pain caused by any pleasure, deserved or not, similar to envy.
[1][2] It is the opposite of pity, as pity is pain at undeserved misfortune.
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