Quickly glossing over index diachronica, there's no common sound change of p<->d, but p<-b->m with the medial b has instances. (sorry for the syntax, no idea ho

Quickly glossing over index diachronica, there's no common sound change of p<->d, but p<-b->m with the medial b has instances. (sorry for the syntax, no idea how to express this)