Definitions

for certain

Part of Speech:

All (6) Adjective (3) Adverb (3)

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inevitable adj.
unmistakable adj.
unquestionable adj.
exactly adv.
for sure adv.
surely adv.

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.

See Examples For:

for certain

Simon Bray, a FanDuel TV analyst and former trainer, said if the revised schedule becomes permanent, there is one thing for certain: “We won’t see another Triple Crown winner.”

From The Wall Street Journal ● Aug. 8, 2026

Earlier preservation treatments may have accidentally created favorable conditions for certain microorganisms.

From Science Daily ● Aug. 7, 2026

It’s worth noting that nobody—not Republicans, not Democrats, not anyone on the fringes—can determine for certain the weight a Piker endorsement carries.

From Slate ● Aug. 7, 2026

The source, who spoke on condition of anonymity as he was not authorised to speak publicly on the matter, said there would be "no exceptions for certain weapons or certain people".

From Barron's ● Jul. 31, 2026

In Massachusetts and Connecticut there still lingered “a traditional reverence for certain families, which has rendered the offices of government nearly hereditary in those families.”

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis

for certain

Example Sentences

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