ep/epi:

comes from Greek and means variously "upon," "besides," "attached to," "over," "outer," or "after."

1. epiphyte:

   a plant that obtains it nutrients from the air and the rain and usually grows on another plant for support. (I saw them growing on power lines in Costa Rica)

2. epitaph:

   an inscription on a grave or tomb in memory of the one buried there.

Cornog, M. (1994). Merriam-Webster's vocabulary builder. Springfield, Mass: Merrian-Webster.