most effective

ADJECTIVE

productive, persuasive

Synonyms

STRONGEST

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

STRONG

effectual efficacious

WEAK

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

Antonyms

STRONGEST

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

STRONG

unproductive unsuccessful

WEAK

fruitless inoperative

ADJECTIVE

in use at the time

Synonyms

STRONGEST

active direct dynamic

WEAK

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

Antonyms

STRONGEST

inactive

WEAK

fruitless impotent incapable ineffective inoperative unproductive useless weak

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Taylor says smaller, handheld versions are most effective indoors.

From BBC • Jul. 8, 2026

Early, intensive tutoring is one of the most effective interventions available to change that, and it’s a support that teachers want in their classrooms.

From The Wall Street Journal • Jul. 6, 2026

Replacing Balogun won’t be easy since he’s emerged as one of the team’s most effective and creative players, either scoring of setting up the go-ahead goal in all three of the U.S. wins.

From Los Angeles Times • Jul. 3, 2026

NBA endorsements "are the single most effective bridge Chinese sportswear brands have into Western consumer consciousness", said Rufio Zhu from sports marketing agency IMG.

From Barron's • Jul. 3, 2026

That seemed the most effective way to overthrow segregationist Jim Crow laws.

From "Because They Marched" by Russell Freedman