certain adjective Stress: first syllable 🤍 Save Syllables: cer-tain (2) English Definition Known for sure; established beyond doubt Example Sentence I am certain that he will come. US IPA /ˈsɝː.tən/ 🔊 Listen US UK IPA /ˈsɜː.tən/ 🔊 Listen UK Synonyms sure confident definite positive Antonyms uncertain doubtful unsure Share this Word Facebook WhatsApp X Telegram Copy Link