This is the 203rd most frequent Bulgarian word.
трябва
"Трябва" means "must" or "have to" in English.
In this interrogative form, 'трябва' asks about obligation.
Трябва ли да дойда утре?
Do I have to come tomorrow?
Here, 'трябва' is used to express necessity or obligation.
Трябва да уча за изпита.
I need to study for the exam.
'Трябва' conveys requirement or need here.