IPA: /ˌɛpɪˈɡrɑfɪkəl/
KK: /ˌɛpɪˈɡrɑfɪkəl/
Relating to the study or interpretation of inscriptions or epigraphs, especially those found on monuments or buildings.
The epigraphical research revealed important historical information about the ancient civilization.
Epigraphical → It is formed from "epi-" (meaning upon or over) and "grapho" (from Greek "grapho", meaning to write). The word refers to writing that is inscribed upon a surface, such as a monument or stone.
Think of writing that is 'upon' a surface — 'epi-' means upon, and 'grapho' means to write.