Meaning : An incidental benefit awarded for certain types of employment (especially if it is regarded as a right).
Example :
A limousine is one of the fringe benefits of the job.
Synonyms : fringe benefit, perquisite
Meaning : Gain or regain energy.
Example :
I picked up after a nap.
Synonyms : gain vigor, percolate, perk up, pick up
Perk meaning in Bengali (Bangla).