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.

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

From MarketWatch • Jun. 12, 2026

Another, the Rybar Telegram channel, credited Madyar with creating "the most effective formation of its kind" within the Ukrainian army.

From Barron's • Jun. 10, 2026

"This is alongside researching the most effective way to enable community-led housing groups to access cash more easily," he said.

From BBC • Jun. 5, 2026

Identifying likely responders in advance could help patients reach the most effective therapy sooner and move diabetes care closer to precision medicine, she said.

From Science Daily • Jun. 5, 2026

His work done, Gandhi returned to India, where Satyagraha became the most effective weapon in the fight for Indian independence.

From "Sugar Changed the World: A Story of Magic, Spice, Slavery, Freedom, and Science" by Marc Aronson