Third-person singular present simple form of declare(verb)
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Use "declareth" in a sentence
"Then he cautioned them against disobedience and quoth he, "Be ye not deluded by becoming my companions nor say to yourselves, We be the assessors of the King; for that the byword declareth: Whenas the King sitteth beware of his severity, and be not refractory whenever he shall say to thee 'Do.'""
"Society, to be sure, does not like this very well; it saith, Whoso goes to walk alone, accuses the whole world; he declareth all to be unfit to be his companions; it is very uncivil, nay, insulting; Society will retaliate."
"When they had gone some distance from the gate, the city being surrounded by a valley with precipitous sides, Ullo pushed him down, shouting as he did so, “Behold your Ballomey who declareth himself son and brother of kings!”"