1741, "pertaining to an editor;" see editor + -al (2). Noun meaning "newspaper article by an editor," is from 1830, American English, from the adjective in reference to such writings (1802). Related: Editorially.
1640s, "publisher," from Latin editor "one who puts forth," agent noun from editus, past participle of edere "to bring forth, produce" (see edition). By 1712 in sense of "person who prepares written matter for publication;" specific sense in newspapers is from 1803.
suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (such as survival, referral), Middle English -aille, from French feminine singular -aille, from Latin -alia, neuter plural of adjective suffix -alis, also used in English as a noun suffix. Nativized in English and used with Germanic verbs (as in bestowal, betrothal).