Directions: Fill in the blank in each of the following statements with one word, the first letter of which is already given as a clue. Note that you are to fill in ONE word only, and you are not allowed to change the letter given.

D linguistics is the systematic description and elucidation of all linguistic changes through time. It studies the historical development of language over a period of time. For example, a study of the changes English has undergone since the time of Shakespeare would be a diachronic study.