v. i. To boil over or unduly. [ 1913 Webster ]
Nor is discontent to keep the mind
Deep in its fountain, lest it overboil
In the hot throng. Byron. [ 1913 Webster ]
v. t. To bid or offer beyond, or in excess of. Dryden. [ 1913 Webster ]
v. t. To outlive. [ Obs. ] Chaucer. [ 1913 Webster ]