undoubted
/ʌnˈdaʊtɪd/ adjective C2- Without doubt; without question; certain. · His undoubted skill meant that he was in much demand.
From the library
Barker was himself an undoubted Englishman; but by his remarks it was clear that he had first known Douglas in America and had there lived on intimate terms with him.
Of what he has _particularly_ accused me I am ignorant; but of the truth of what I shall relate I can summon more than one witness of undoubted veracity.
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