noun ( pl. -ses |-ˌsēz|) (usu. one’s nemesis)
the inescapable or implacable agent of someone’s or something’s downfall : the balance beam was the team’s nemesis, as two gymnasts fell from the apparatus.
• a downfall caused by such an agent : one risks nemesis by uttering such words.
• (often Nemesis) retributive justice : nemesis is notoriously slow.
ORIGIN late 16th cent.: Greek, literally ‘retribution,’ from nemein ‘give what is due.’
Nemesis |ˈneməsis| Greek Mythology
a goddess usually portrayed as the agent of divine punishment for wrongdoing or presumption (hubris).