philological

US /ˌfɪl.əˈlɑː.dʒɪ.kəl/
UK /ˌfɪl.əˈlɑː.dʒɪ.kəl/
1.

filologisch

relating to the study of language, especially its history and development:

:
•
The book was the outcome of his philological work.