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5.21
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certain adjective [ ˈsəːt(ə)n ]

• able to be firmly relied on to happen or be the case.
• "it's certain that more changes are in the offing"
Similar: unquestionable, sure, definite, beyond question, not in question, not in doubt, beyond doubt, unequivocal, indubitable, undeniable, irrefutable, indisputable, incontrovertible, incontestable, obvious, patent, manifest, evident, plain, clear, transparent, palpable, unmistakable, conclusive, recognized, confirmed, accepted, acknowledged, undisputed, undoubted, unquestioned, unchallenged, uncontested, there are no two ways about it, as sure as eggs is eggs, very likely, bound, destined, predestined, fated, trusted, assured of doing something, nailed on, inevitable, assured, reliable, unavoidable, inescapable, automatic, bound to happen, sure to happen, unpreventable, inexorable, ineluctable, predictable, necessary, out of one's hands, in the bag, dependable, trustworthy, sound, foolproof, tested, tried and tested, effective, efficacious, guaranteed, unfailing, infallible, unerring, sure-fire, sovereign,
Opposite: unthinkable, doubtful, possible, unlikely, unreliable,
• specific but not explicitly named or stated.
• "he raised certain personal problems with me"
Similar: determined, definite, fixed, established, precise, defined, exact, explicit, express, particular, specific, individual, special, especial,
Opposite: undefined, nameless, undifferentiated, general,

certain pronoun

• some but not all.
• "certain of his works have been edited"
Origin: Middle English: from Old French, based on Latin certus ‘settled, sure’.

for certain

• without any doubt.
"I don't know for certain"

make certain

• take action to ensure that something happens.
"make certain Lewis knows all the facts"

of a certain age

• no longer young (used politely or euphemistically).
"women of a certain age swooned over his acerbic wit"



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