What Is Comparative Historical Linguistics

The comparative method in historical linguistics is concerned with the reconstruction of an earlier language or earlier state of a language on the basis of a comparison of related words and expressions in different languages or dialects derived from it.

What do you mean by comparative linguistics?

comparative linguistics, formerly Comparative Grammar, or Comparative Philology, study of the relationships or correspondences between two or more languages and the techniques used to discover whether the languages have a common ancestor.

What are the purposes of studying historical comparative linguistics or comparative linguistics?

Comparative linguistics, or comparative-historical linguistics (formerly comparative philology) is a branch of historical linguistics that is concerned with comparing languages to establish their historical relatedness.