श्रुवः शृ च
SV: none
AV: सार्वधातुके कर्तरि श्नुः

Language Meanings: In presence of a सार्वधातुक प्रत्यय in the कर्तरि प्रयोग, the verb श्रु is converted to शृ and it gets the श्नु विकरणप्रत्यय.

Literal Meaning:
verb(long/erect superior) wave/speaker exist - erect/long superior - knot