आतश्चोपसर्गे
SV: आतः च उपसर्गे
AV: कृत् कः
Language Meaning: Also after a verb ending in long आ when there is a preposition along with it, the affix क is placed.
Literal Meaning: here here tumbi अपादान (long knot) rope align संप्रदान(fish+water)