Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Diaeresis (prosody)
Diaeresis comes from the Ancient Greek noun "diaíresis" (διαίρεσις) "taking apart" or "division" (also "distinction"), from the verb "diairéō" (διαιρέω) "take apart", a compound of the verb "airéō" (αἱρέω) "take" and the preposition "diá" (διά) "through" (in compounds, "apart").