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.