ὅπλον

Etymology
Probably from the primary word, unrelated to.

Noun

 * 1) tool, instrument
 * 2)  a ship's tackle, rope
 * 3)  instruments of war: arms, armour, weapon
 * 4) specifically the large shield carried by hoplites
 * 5)  place of arms, camp
 * 6)  penis
 * 7) a gymnastics exercise