efficacy

1. The division of the product of a unit's hit points and damage by its attack period
2. The derivative of impact

A rifleman's efficacy turns out to be 7070.

by anonymous July 12, 2004

efficacious

An adjective (descriptive word):

Describing thing, or person, producing, or sure to produce, desired effect.

"Efficaciously" (adverb) describing the behaviour of act in such a manner as to effect the desired effect.
I may help to understand that the Latin root for these words is the same as that for "Efficient".

Asprin is truly "efficacious" for the treatment of headaches.

I've never known a teacher to be so consistent in dealing so "efficaciously" with problem students, as he does.

by Sparticus774 May 27, 2014

Efficable

A way of describing a woman as beautiful, sexy, pretty, and worth F____ing

Cole: Hey Taylor what do you think of Violeta?
Taylor: Man she's gorgeous! Totally Efficable

by Blanconino1328 March 21, 2009