This is the 767th most frequent Turkish word.
burak
"Burak" is a male given name in Turkish, derived from Arabic, meaning "lightning" or referring to the mythical creature in Islamic tradition that carried the Prophet Muhammad during the Night Journey.
In this sentence, 'Burak' is used as a proper noun.
Burak okula gidiyor.
Burak is going to school.
Here, 'burak' is a form of the verb 'bırak' (to let go), modified for a first-person imperative structure.
Burak şu an biraz yoruldum, dinleniyorum.
Let go, I am a bit tired right now, I am resting.
In this usage, 'burak' is casual and colloquial, meaning to stop or leave something, derived from 'bırak' for a direct addressing.