† emˈboilObs.rare. Also 6 emboyl. [f. en- + boil.] a.trans. To cause to boil or to agitate with rage. b.intr. To be in a boil or agitation. 1590Spenser F.Q. i. xi. 28 Emboyled, grieued, brent.Ibid. ii. iv. 9 The Knight emboyling in his haughtie hart.