Definitions

for certain

ADJECTIVE

inevitable

Synonyms

STRONGEST

imminent impending inescapable inexorable irresistible necessary unavoidable undeniable

STRONG

binding doomed pat

WEAK

all locked up assured compulsory decided decreed destined determined fated fateful fixed foreordained in the bag ineluctable ineludible inflexible irrevocable no ifs ands or buts obligatory ordained prescribed settled sure unalterable unpreventable without recourse

Antonyms

STRONGEST

avoidable distant escapable later

WEAK

doubtful fortuitous preventable uncertain unlikely unsure

ADJECTIVE

unmistakable

Synonyms

STRONGEST

apparent conspicuous distinct evident explicit indisputable obvious palpable pronounced straightforward unambiguous unequivocal

WEAK

clear decided glaring manifest no ifs ands or buts open and shut patent plain positive self-explanatory sure transparent univocal

Antonyms

STRONGEST

ambiguous disputable doubtful dubious equivocal hidden indefinite indistinct obscure questionable secret uncertain unclear unknown unsure vague

WEAK

doubtul mistakable

ADJECTIVE

unquestionable

Synonyms

STRONGEST

absolute indisputable self-evident undeniable unequivocal unmistakable

WEAK

accurate authentic bona fide certain clear cold conclusive dependable down pat downright established faultless flat flawless genuine incontestable incontrovertible indubitable irrefutable manifest no ifs ands or buts obvious pat patent perfect positive real reliable superior sure sure-enough true undisputable undoubted unimpeachable veritable well-founded well-grounded

Antonyms

STRONGEST

disputable indefinite uncertain unsure vague

WEAK

doubtful questionable

ADVERB

exactly

Synonyms

STRONGEST

absolutely altogether carefully completely correctly definitely explicitly indeed literally precisely quite specifically strictly totally truly

STRONG

just

WEAK

bang expressly faithfully faultlessly for a fact for sure in every respect methodically no mistake on the dot on the money on the nail on the nose positively right rigorously scrupulously severely sharp square the ticket truthfully unequivocally unerringly utterly veraciously wholly

Antonyms

STRONGEST

doubtfully dubiously incompletely indefinite partially questionably

WEAK

inaccurately inexactly

ADVERB

for sure

Synonyms

WEAK

certainly dead sure definitely for a fact for real no doubt no question no two ways about it really surely unquestionably

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 indubitably infallibly irrefutably manifestly nothing else but positively rain or shine to be sure 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.

She asked to tap into the Family and Medical Leave Act, which protects workers who take time off for certain medical and family reasons.

From MarketWatch • Jul. 7, 2026

“So you don’t really know for certain how many vessels and what volume they’re carrying. There’s a question mark there.”

From The Wall Street Journal • Jul. 1, 2026

And French President Emmanuel Macron in May proposed a European "Section 301" -- the trade tool US President Donald Trump has employed to set higher tariffs for certain sectors after investigations.

From Barron's • Jun. 29, 2026

When the U.S. raised tariffs on China, Vuori had to adjust its vendors and partners for certain goods, according to Kechter.

From The Wall Street Journal • Jun. 23, 2026

I thought for a moment that some of the people in sheets might be women, but I couldn’t tell for certain.

From "March Forward, Girl" by Melba Pattillo Beals

for certain

Example Sentences

Related Words