PWS

*dVb(V)r- - back, hind part (SED I No. 46)

As an anatomic term has a scarce attestation.

PWS

*dbr - to turn the back; to lie on one’s back (SED I 44)

Adduced under No.45

Mandaic

dibra - back, tail (MD 106)

Arabic

dubr-, dubur- - backside, posteriors, buttocks, rump, podex, anus (BK 1 665, Lane 846)

Arabic

dabr- - location, or quarter, that is behind a thing (BK 1 665, Lane 845)

Amharic

ǯəbär - backbone (AED 1864)

Not quite reliable