Meaning & use
nemesis
A long-standing rival or opponent who is very difficult to defeat, or a source of persistent harm.
See it in a sentence
The detective finally caught up with his nemesis after years of pursuit.
For the chess champion, losing to beginners became her strange nemesis.
A note on using this word
The plural of "nemesis" is "nemeses," not "nemesises"; it follows the Greek pattern also seen in "crisis/crises."
Words with a similar meaning
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Words with an opposite meaning
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