wallop
noun/ˈwɒləp/
/ˈwɑːləp/
[singular] (informal)- a heavy, powerful hitWord OriginMiddle English (as a noun denoting a horse's gallop): from Old Northern French walop (noun), waloper (verb), perhaps from a Germanic phrase meaning ‘run well’, from the bases of the adverb well and leap. Compare with gallop. From ‘gallop’ the senses ‘bubbling noise of a boiling liquid’ and then ‘sound of a clumsy movement’ arose, leading to the current senses.
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wallop