refute

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refute /rɪˈfjuːt/ verb
refutes; refuted; refuting
refute
/rɪˈfjuːt/
verb
refutes; refuted; refuting
Learner's definition of REFUTE
[+ object] formal
: to prove that (something) is not true
: to say that (something) is not true

— refutation

/ˌrɛfjʊˈteɪʃən/ noun, plural refutations formal [count, noncount]