Thesaurus.com
Dictionary.com

made certain

ADJECTIVE
assured
Synonyms
STRONGEST
guaranteed settled sure
STRONG
cinched clear-cut clinched confirmed decided racked sealed secure set
WEAK
beyond doubt definite in the bag indubitable irrefutable nailed down on ice positive pronounced sewed-up surefire undoubted unquestionable
Antonyms
STRONGEST
indefinite uncertain unsure
STRONG
undecided vague
WEAK
doubted doubtful

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.

Leaders Liverpool have now made certain of their Champions League place, and require a maximum of six points from their last six games to clinch the title.

From BBC • Apr. 18, 2025

A 3-1 win on the day made certain of that and soon a sea of light blue shirts flooded the field.

From Seattle Times • May 19, 2024

He made certain attempts to run for higher political office that didn't quite pan out.

From Salon • Aug. 1, 2023

By this point Bennett had been grappling for five years with Alzheimer’s disease, which made certain everyday parts of his life difficult — except, many around him have said, for performing.

From Los Angeles Times • Jul. 21, 2023

They made certain no one got close to the old man without his leave.

From "A Dance with Dragons" by George R. R. Martin