This is the 10852nd most frequent Turkish word.
desem
"Desem" means "if I say" or "should I say" in Turkish.
Here, 'desem' is used conditionally indicating a suggestion or thought being proposed.
Dışarı çıkalım desem, gelir misin?
If I say we should go outside, would you come?
In this instance, 'desem' introduces a hypothetical suggestion for discussion.
Bugün hava çok güzel, sahile gitsek desem ne dersiniz?
Today the weather is great, if I say we should go to the beach, what do you think?
Here, 'desem' expresses a conditional offer or willing intention.