Selti

fōdo - buttocks, anus (EDG 228)

Leslau refers to Cerulli, who considers the Har. and Sel. forms Cush. loanwords.

PS
*p/ban/md(at)- - back, podex (SED I No. 216)

Phonetically a very difficult case; diverse phonetic processes are likely due to different patterns of compatibility of root consonants in various languages.