The monograph concerns the origin of the Latin -iēs/-ia inflection, the topic which to this day has not been explained satisfactorily. The proposal presented in the book allows for the most economic solution to the problem without difficult assumptions which were present in the previous hypotheses. The author  explains the origin of the formation as the result of the identification and mutual influence of three former paradigms reconstructed for Proto-Indo-European and subsequent analogical influence of the commonly used Latin noun diēs ‘day’ from the fifth declension.

Apart from the hypothesis itself, the analysis of all the forms of the Latin -iēs/-ia inflection is presented with an etymological commentary and illustrative examples from the original ancient texts. The question on the origin of the Latin fifth declension is also mentioned alongside the modern description of the Proto-Indo-European derivational morphology.

Dariusz R. Piwowarczyk – Assistant Professor in the Department of Classical Philology at the Jagiellonian University in Kraków. He holds an M.A. degree in Classical Philology (Jagiellonian University) and  omparative Indo-European Linguistics (Leiden University) alongside a Ph.D. in Linguistics (Jagiellonian University). He specializes in the historical and comparative linguistics of the Indo-European languages, especially of Latin and Greek.