"to apply" (one thing to another), 1590s, either from French apposer (from a "to;" see ad-, + poser "to place;" see pose (v.1)), or else formed in English from Latin apponere "lay beside, set near; put upon, apply" (see apposite) on analogy of compose, expose, etc. In Middle English, an identical word was a variant spelling of oppose. Related: Apposed; apposing.
appointee
appointment
Appomattox
apportion
apportionment
appose
apposite
apposition
appositive
appraisal
appraise