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).
Prick (slang)
The word comes from the Middle English "prikke", which originates in the Old English, "prica" "point, puncture, particle, small portion of space or time." The meaning of prick as a 'pointed weapon' or 'dagger' is first noted in the 1550s. Prick as a verb for sexual intercourse can be seen as early as the 14th century, in Geoffrey Chaucer's "Canturbury Tales". The Oxford English Dictionary records the first use of the word prick as penis in 1592, although it was probably used in the spoken language for some time before. It was "probably coined with the image of a thorn in mind from the shape and image of penetration evoked", says Thorne. The earliest use of the noun prick as penis is observed in the works of Shakespeare, who uses it playfully several times as a double entendre with the non-sexual meaning of prick, i.e., "the act of puncturing" as in the following examples: