Grammaticalization is a well-attested process of linguistic change in which a lexical item becomes a function word, which may be further reduced to a clitic or affix. Proponents of the universality of grammaticalization have usually argued that it is unidirectional and have thus found it a useful tool in linguistic reconstruction. In this book Professor Norde shows that change is reversible on all levels: semantic, morphological, syntactic, and phonological. As a consequence, the alleged unidirectionality of grammaticalization is not a reliable reconstructional tool, even if...

Grammaticalization is a well-attested process of linguistic change in which a lexical item becomes a function word, which may be further reduced to a clitic or affix. Proponents of the universality of grammaticalization have usually argued that it is unidirectional and have thus found it a useful tool in linguistic reconstruction. In this book Professor Norde shows that change is reversible on all levels: semantic, morphological, syntactic, and phonological. As a consequence, the alleged unidirectionality of grammaticalization is not a reliable reconstructional tool, even if...