affix (v.)
1530s, from Medieval Latin affixare, frequentative of Latin affigere (past participle affixus) "fasten to, attach," from ad- "to" (see ad-) + figere "fasten" (see fix (v.)).

First used by Scottish writers and perhaps from Middle French affixer, a temporarily re-Latinized spelling of Old French afichier (Modern French afficher). Related: Affixed; affixing.
affix (n.)
1610s, from affix (v.).