Sentence:  The principal weapon of the hoplite was the <WSD>"dory</WSD>" spear. It was unusually long – it could measure up to 10ft (3m) in length, and weighed about 4.4lb (2kg). At one end was a broad, leaf-pattern spearhead, while at the other end was a metal spike called a "sauroter". The purpose of the spike is much debated: it almost certainly acted as a counterbalance, making the spear easier to hold and wield; it could have been used as an improvised spear point, or for making downward attacks on the enemy's exposed feet; or it might even have been embedded in the ground to keep the spear in place. 
Meaning of the word marked with <WSD> tags:  A wooden pike or spear about three metres (ten feet) in length with a flat, leaf-shaped iron spearhead and a bronze butt-spike (called a sauroter), which was the main weapon of hoplites in Ancient Greece. It was usually not thrown but rather thrust at opponents with one hand.