PS

*dVrdVr- - toothless mouth, gum (SED I No. 56; Kogan 2011: 222)

Akkadian
dūr šinni - gums (CAD D 197, AHw. 155)
may go back to PS *dVrdVr-, being reinterpreted as dūru ‘walľ by popular etymology (Kogan 2003a:128–129).
Jewish Babylonian Aramaic
drārā - gum (Jastrow 325, DJBA 353)
Jewish Babylonian Aramaic
dūr šinnē - gums (DJBA 322b)
most probably an Akkadian loanword
Syriac
dūrā, dawrā, dawrətā - sockets of teeth (LSyr. 147, SL 287)
Arabic
ˀadrad-, ˀadram- - toothless (BK 1 687, Lane 870)
Arabic
durdur- - part of the gum where teeth grow (BK 1 687)
Tigre
dərdər gäˀa - to grow toothless (WTS 522)
Amharic
däräddärä - to cut teeth (AED 1752)