i Register
In some senses, stumper is marked as informal, archaic, slang. Watch for register when choosing this word.
stumper
UK /ˈstʌmpə/ US /ˈstʌmpɚ/
noun 4
Definitions
noun
1
One who stumps, or speaks, or orates, as a politician.
2
A wicketkeeper.
He's not yet well known, but he's a good stumper.
3
A difficult puzzle or problem.
Global warming is a real stumper.
4
A boastful person
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