dōpnā, dāpnā - the chest surrounding the lungs; ribs; a single rib; the parties of the abdomen; board-partition
(Jastrow 287, DJBA 348a)
Jewish Babylonian Aramaic
darnā - name of a parasite worm (found in the sheep's head); moth (in clothes), wood worm
(DJBA 353)
Hbr. pB. and Jud. (one of them most probably borrowed from the other)
are likely related, with a meaning shift ‘skin disease’ > ‘insect causing skin disease /
damage’.