The article deals with the sequence (“the chain”) of phonetic changes that have determined the phonetic shape of Lat. barba ‘beard’, the relative chronology
of the phonetic processes in the history of the word, and of the associated phonetic processes. The development of Indo-European aspirated consonants in the history of Latin, other Italic languages and Proto-Italic, can be demonstrated in the scheme of the sequence and relative chronology of the phonetic processes that can be seen in Lat. barba.