Bebaak is the Urdu lafz used to describe something or someone fearless or bold.
Here are some couplets, the first by Mirza Ghalib and the second by Allama Iqbal that uses this lafz:
I wept so much in love, that it made me fearless
I was washed so much, that I became pure
The heart is empty of passion, the glance is impure
It is no wonder that you are not fearless any more