The storyLatin · derived fromad-English todayaf-Assimilated form of ad- before f. From Latin ad-.Words from the same rootsLatinad- all →aimachieveassurearrestaffairaccordamortizationaccoladeafforestationassuageadsorbac-accollaccouchementad-an-animadvertappresentationar-as-at-Etymology from Wiktionary, CC BY-SA 4.0.