The word "sesame" is pronounced as "se" "suh" "mee", with 3 syllables. Why is it not pronounced as "se" "same", with 2 syllables?
The pronounciation is derived from the French original term which entered Middle English at the beginning of the 15th century:
1425; Middle English sisamie, from Middle French sisame, learned borrowing from Latin sīsamum, variant of sēsama, from Ancient Greek σήσαμον (sḗsamon, “sesame seed”),
Due to its origin :
According to Oxford , sesame
Late Middle English: via Latin from Greek sēsamon, sēsamē; compare with Arabic simsim.