1650s, "denoting the initial point or step," from French inceptif (16c.), from Latin incept-, past participle stem of incipere "to begin" (see inception). Interchangeable with inchoative. As a noun, "an inceptive verb," from 1610s.
early 15c., "a beginning, a starting," from Old French inception and directly from Latin inceptionem (nominative inceptio) "a beginning; an undertaking," noun of action from past-participle stem of incipere "begin, take in hand," from in- "in, on" (from PIE root *en "in") + -cipere, combining form of capere "take, seize," from PIE root *kap- "to grasp."