etymologically

Etymology tree Proto-Indo-European *set-? Ancient Greek ἐτεός (eteós)der.? Ancient Greek ἔτῠμος (étŭmos) Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Ancient Greek -λογος (-logos) Ancient Greek ἐτῠμόλογος (etŭmólogos) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ (-ĭ́ā) Ancient Greek ἐτῠμολογῐ́ᾱ (etŭmologĭ́ā)bor. Latin etymologiader. Old French ethimologiebor. Middle English ethymologie English etymology Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ic Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al Middle English -ical English -ical English etymological Proto-Indo-European *leyg- Proto-Germanic *līkąder. Proto-Germanic *-līkaz Proto-Germanic *-ê Proto-Germanic *-līkê Old English -līċe Middle English -ly English -ly English etymologically From etymological + -ly.

来源：wiktionary