Proto-MSA

*rḫy - to come loose, to be released (ML 335)

Mehri
hərḫū - (H) to release, slacken (ML 335)
Jibbali
erḫé - to pay out (a rope); to slacken, loosen (JL 218)
Harsusi
reḫō - to come loose (HL 107)