French · Pronunciation Guide
sür — a hissing "s", the tight French "u", and a throat "r". Not "sure" and not "soor".
One syllable. The feminine "sûre" sounds the same; only the spelling changes. The circumflex is doing purely visual work here.
Listen: sûr
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Tu es sûr ?
Are you sure?
Listen: Tu es sûr ?
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
"Tu es sûr ?" is a question made by intonation alone, rising sharply on the last word. "Tu es" often contracts to "t'es" in speech, so the whole thing can come out as two syllables: teh-SÜR. To a woman you would write "sûre", with no change in sound. The fuller version is "tu es sûr de toi ?"
The English word "sure" is a total mismatch — it starts with "sh" and has a completely different vowel. French wants a clean "s" and the tight /y/. Learners who avoid "shoor" usually land on "soor", substituting the back /u/ vowel, which drags the word toward "sourd" (deaf) rather than anything meaning certain. Round your lips while keeping the tongue high and forward, exactly where it sits for "ee".