PS

*ḥaŝy- - entrails (SED I No. 128)

Originally may have a more specified meaning ‘lung(s)’ (in Akk.) and ‘asthma’ (in some of the Arb. forms and in Sab.)

Akkadian
ḫašû - human lungs, belly, entrails (CAD ḫ 143, AHw 335)
Von Soden gives the meaning ‘Lunge’ only [ibid.]. Note also ḫišû ‘a part of the human body’ [CAD ḫ 206]
Arabic
ḥišwat­-, ḥašwat-, ḥašaⁿ - viscera (any interior part of the body); intestines (BK 1 435)
Also maḥšaⁿ ‘stomach’ (BK 1 436); ḥašaⁿ ‘painful breathing; asthma’; ḥašiⁿ ‘painful breathing’; ḥšy ‘have asthma’ [ibid.]; semantic shifts from the unattested/lost meaning ‘lung’.
Arabic
maḥšaⁿ - stomach (BK 1 436)