Definitions

to be sure

ADVERB

indeed

Synonyms

STRONGEST

absolutely certainly easily naturally really surely truly undeniably undoubtedly very very much

WEAK

amen doubtlessly even for real in point of fact in truth much of course positively strictly sure thing verily veritably well

Antonyms

STRONGEST

doubtfully dubiously indefinite questionably

ADVERB

surely

Synonyms

STRONGEST

absolutely assuredly certainly clearly definitely evidently indeed inevitably inexorably plainly undoubtedly unquestionably

WEAK

admittedly beyond doubt beyond shadow of doubt come what may conclusively decidedly distinctly doubtlessly explicitly fixedly for certain indubitably infallibly irrefutably manifestly nothing else but positively rain or shine unequivocally unerringly unfailingly unmistakably unshakably with certainty without fail

Antonyms

STRONGEST

doubtfully dubiously indefinite indefinitely questionably vaguely

WEAK

uncertain

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.

"It's not enough to put down a glass of water and tell them to drink. You have to be sure they actually do," said head nurse Badra Hamadi.

From Barron's • Jun. 23, 2026

Olsen: I want to be sure to ask you about some of the other cast on the show, specifically Guz Khan.

From Los Angeles Times • Jun. 11, 2026

Labor is a big part of cooking, and you want to be sure you all align on this as well.

From MarketWatch • Jun. 11, 2026

Sam's prediction: This is interesting because Liverpool still need something to be sure of finishing fifth.

From BBC • May 22, 2026

Bat wanted to be sure that Israel was taking this seriously.

From "A Boy Called Bat" by Elana K. Arnold

to be sure

Example Sentences

Related Words