Thesaurus

certain

Synonyms and Antonyms of certain

1 known but not named

  • a certain person told me that today is your birthday
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2 having or showing a mind free from doubt

  • Iʼm certain that theyʼll arrive on time
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4 impossible to avoid or evade

  • as he got older, the athlete began to feel the certain effects of the aging process on his body
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Phrases Synonymous with certain

in the bag, in the cards (also on the cards)

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5 not likely to fail

  • chicken soup is grandmaʼs certain cure for pretty much whatever ails you
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Synonym Discussion of certain

sure, certain, positive, cocksure mean having no doubt or uncertainty. sure usually stresses the subjective or intuitive feeling of assurance.
    • felt sure that I had forgotten something
certain may apply to a basing of a conclusion or conviction on definite grounds or indubitable evidence.
    • police are certain about the cause of the fire
positive intensifies sureness or certainty and may imply opinionated conviction or forceful expression of it.
    • I'm positive that's the person I saw
cocksure implies presumptuous or careless positiveness.
    • you're always so cocksure about everything


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