Though Arb. and MSA only, rather a common Sem. root: the MSA words being main terms for ‘bone’ can hardly be loan-words from Arb., with its very specified meaning.
*ˁVwVl- - young animal, foal, suckling
(SED II No. 47; Kogan 2015: 116)
nominal root is not directly attested in Arabic, but ˁayyil- ‘the persons whom a man feeds’ (Lane 2201) and similar formations are most probably
related to it (Kogan 2015: 116)