British spelling of the present participle; the act of explaining something with excessive detail or working on something too hard.
Present participle of British 'belabour,' maintaining the 'u' spelling while adding '-ing' to show ongoing action. The British spelling preserves the French-influenced 'u' from Old Norman French influence on English.
In British English, they're 'belabouring a point,' while Americans say 'belaboring'—but the annoyance of listening to either is exactly the same!
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