Mod'u-late, to vary or inflect.
"McGuffey's Fifth Eclectic Reader"
William Holmes McGuffey
They inflect both their nouns and verbs regularly; and denote the cases of the former and the tenses of the latter, not like the English by auxiliary words, but like the Latins by change of termination.
"A Complete Account of the Settlement at Port Jackson"
Watkin Tench
His privacy, his habits, his freedom-all at the mercy of this white-faced boy, these two intolerable women, and the still more intolerable doctor, on whom he intended to inflect a stinging lesson!
"The Mating of Lydia"
Mrs. Humphry Ward