a. [ See Effect, n. ] Producing, or having adequate power or force to produce, an intended effect; adequate; efficient; operative; decisive. Shak. [ 1913 Webster ]
Effectual steps for the suppression of the rebellion. Macaulay. [ 1913 Webster ]
Effectual calling (Theol.),
n. the power to be effective.
adv.
n. The quality of being effectual. [ 1913 Webster ]