Barba and Bestia: bH>b (dissimilation)

Latin barba (instead of expected *farba) < *bHardHa: (cf. Lit. barzda, OSl. brada, CGer *bardo:)

Latin bestia (instead of expected *festia) < *dHwez-dHtia? (cf. CGerm *deusja-)

 

Do these examples prove a dissimilation bH-dH > b-dH in Latin?

 

 

JS Lopes