Arabic

ˀiḥlīl- - udder or penis canal (BK 1 474)

A very specified anatomic meaning is similar in Arb. and Tgr. ḥəlil. It may be alternatively explained by an Arabism in Tgr., in which case the Arb. term, possibly with an original meaning ‘opening’ or ‘canaľ without any anatomic connotations, should be compared to Akk. ḫālilu (ḫalīlu) ‘a kind of canal or ditch’ SB [CAD ḫ 42] and Syr. ḥəlīlā ‘rima; caverna; tubus’ [Brock. 232]. But in view of difference in meaning and pattern, pace Syr. ḥeltā ‘vagina’ and Tgr. ḥəletät ‘penis’ are hardly Arabisms ([Leslau Loanwords 166]). They can be as well compared to each other and to Arb. ‘canal of the penis’ still making a Sem. anatomic term with a possible meaning ‘canal of the genital organ’.

PS
*ḥil(Vl)- - canal (anat.), urethra (?) (SED I No. 115)
A difficult case with scarce attestation.