This is the 14th most frequent Persian word.
باید
"باید" means "must" or "should" in English.
'باید' here expresses necessity or obligation.
شما باید درسهای خود را بخوانید.
You must study your lessons.
'باید' in this sentence indicates a personal resolution or intent.
باید بعد از کار به خانه بروم.
I should go home after work.
'باید' here is used to ask about a necessity or suggestion in the context of the question.