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.
