What is "pezhetairos"

The pezhetairoi ( Greek and Ancient Macedonian: , singular: pezhetairos)were the backbone of the Macedonian army and Diadochi kingdoms. They were literally "foot companions" (in Greek, pezos means "foot warrior" or "infantryman", and hetairos means "companion" or "friend").

The Macedonian phalanxes were made up almost entirely of pezhetairoi. Pezhetairoi were very effective against both enemy cavalry and infantry, as their long pikes could be used to impale enemies charging on horse-back or to keep enemy infantry with shorter weapons at bay.