Definition of "encreaseth"
verb
(archaic) third-person singular simple present indicative of encrease
Quotations
I have reckoned upon a Medium, that a Child juſt born will weigh twelve Pounds, and, in a ſolar Year, if tolerably nurſed, encreaſeth to Twenty-eight Pounds.
1729, [Jonathan Swift], A Modest Proposal […], third edition, Dublin: Weaver Bickerton, published 1730, page 11