This is the 5319th most frequent Polish word.
sezamu
"Sezamu" means "sesame."
The word 'sezamu' refers to sesame seeds as a food ingredient.
Znalazłem worek pełen sezamu w spiżarni.
I found a bag full of sesame in the pantry.
Here, 'sezamu' indicates sesame seeds as an ingredient used for cooking.
Sezamu używa się często do przygotowania słodkości.
Sesame is often used in making sweets.
In this sentence, 'sezam' (not 'sezamu explicitly') refers to the magical sesame from the story "Ali Baba and the Forty Thieves."