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countless adjective

Click to hear the UK pronunciation of this wordClick to hear the US pronunciation of this word/ˈkaʊnt.ləs/ adj

Definition

very many; too many to be counted
There are countless arguments against this ridiculous proposal.
I've heard it played countless times on the radio.

(Definition of countless adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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