Apposite
Definition: appropriate or well-put
This one comes from the root of “posit” which means “to assert.” This is also where we get “position” from, as a position is essentially an “assertion of place.”
The prefix is not the Greek “a” (which would mean “opposite”) but rather the Latin “ad,” which means “toward.”
Why I Looked It Up
From Life Lessons from Literature, when discussing Middlemarch:
The subtitle “A Study of Provincial Life” is particularly apposite, as Eliot describes in exacting detail the ambitions, interactions, vocations, manners and relationships of an array of different characters.