Akkadian

eṣēpu - to twine, to double (CAD E 345; AHw 252)

PS
*ˁṣ̂p/*ṣ̂ˁp - to tie, to wrap (CDG 74‒75)
the root *ˁṭp is related to the present (CDG 75) Proto-MSA *γfṣ̂ might also be related