epi

upon; over

Spelled epi · epi 'on, upon, over'; also 'toward' or 'in addition'

Greek epi meant upon: an epithet is placed upon a name, an epigraph upon a work, and an epidermis upon deeper skin.

Words built from it

epitome — a perfect example of a quality or type
epi- (upon) + tome (cut)
epithet — a descriptive name or phrase applied to someone or something
epi- (upon) + thet (put)
epistolary — relating to letters or written as a series of letters
epi- (toward) + stol (send) + -ary (relating to)
epidermis — the outer layer of skin
epi- (upon) + derm (skin) + -is (noun ending)
epilogue — a concluding section added after a story's main action
epi- (in addition) + logue (speech)
epigraph — a quotation placed at the beginning of a work; also, an inscription
epi- (upon) + graph (write)
episode — a distinct event or one installment of a larger story
epi- (in addition) + ode (way)

decrepit — From Latin decrepitus, 'very old, worn out'; its internal letters epi do not represent the Greek prefix.

-ary/-ory — Makes adjectives meaning relating to, or nouns for associated people, things, or places.
graph — writing