most effective

active adequate compelling competent direct efficient forceful impressive potent powerful practical sufficient useful valid

effectual efficacious

able capable cogent convincing emphatic energetic forcible having lead in pencil live moving on the ball operative playing hardball powerhouse producing resultant serviceable serving sound striking telling trenchant virtuous wicked yielding

helpless impotent inadequate incapable incompetent ineffective inefficient insufficient unable useless weak worthless

unproductive unsuccessful

fruitless inoperative

active direct dynamic

actual current in effect in execution in force in operation operative real

inactive

fruitless impotent incapable ineffective inoperative unproductive useless weak