1540s, from Middle French vincible and directly from Latin vincibilis "that which can be gained; easily maintained," from vincere "to overcome, conquer" (from nasalized form of PIE root *weik- (3) "to fight, conquer"). A vincible ignorance in theology is an ignorance in one who possesses the means of overcoming it.
villein
villus
vim
vinaigrette
Vincent
vincible
vinculum
vindicate
vindication
vindicative
vindicatory