This is the 7th most frequent Bulgarian word.
ще
"Ще" means "will" (used to indicate future tense).
Here, 'ще' introduces a question regarding a future event.
Ще дойдеш ли с мен?
Will you come with me?
In this case, 'ще' is used in the protasis (the 'then' clause) of a conditional statement to express a potential future action.
Ако вали, ще останем вкъщи.
If it rains, we will stay at home.
In this sentence, 'ще' is used to indicate a simple future tense.