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.

But for Donald Trump, another benefit may be early access to what could be the world’s most effective weight loss medication.

From Slate • Jun. 23, 2026

Without getting too wonky about the mechanics of privacy laws, the most effective thing they could do is to impose accountability.

From The Wall Street Journal • Jun. 23, 2026

“This is their most effective strategy because it works. Pick up the most visceral, outrageous anecdotes and then repeat them and amplify them as much as possible,” he said.

From Los Angeles Times • Jun. 18, 2026

One of the most effective ways to prevent future financial mistakes is to set rules of thumb, she noted.

From MarketWatch • Jun. 12, 2026

“There can be no justification or military grounds for refusing any further to employ what promises to be our most effective weapon,” Admiral Alfred von Tirpitz declared.

From "The War to End All Wars: World War I" by Russell Freedman