A word ending with the Ablative -5th case-affix is optionally compounded with the word bhaya 'fear' and the resulting compound is tat-puruṣa ,
The phrase सुप् सुपा is understood here, and the sutra qualifies it.
As वृकेभ्यो भयं=वृकभयं 'fear from wolves,' चौरभयं 'fear from thieves,' दस्युभयं 'fear from robbers.'
Vart:- So also with the words भीत, भीति, and भीः as वृकभीतः, वृकभीतिः, वृकभीः.
This sutra is an expansion of sûtra 32 and an exposition of the word बहुल there. So that we may have the following compounds also: ग्रामनिर्गतः 'gone out of the village.' अधर्म जुगुप्सुः .,