Mehri

ŝrayn - leg, foot (ML 382; Nakano 1986:9)

The term is well-attested in SAE IX and SAE III (Mundart B) (see Kogan 2015:502 for examples).

PS
*ŝVry/w/ˁ-, *ŝVry/ ˁ-ān- - (Achilles) tendon; sinew, muscle (of leg) (SED I No. 268)
A very difficult case (v. SED I).