The Spanish word 'centro' (meaning 'center') traces back to Ancient Greek through Latin. It began with the Greek verb 'kentéo' (κεντέω), which meant 'to prick' or 'to goad'. From this verb came the Greek noun 'kentron' (κέντρον), which meant 'point', 'goad', or 'center' - the connection being that the center point was like a sharp point marked in the middle of a circle. This word was borrowed into Latin as 'centrum', specifically referring to the 'center' or 'fixed point of a compass'. The Latin word then evolved into the Spanish 'centro', maintaining its meaning of 'center'.

Some common Spanish words related to 'centro' include 'central' (central), 'céntrico' (centrally located), and 'concentrar' (to concentrate). All these words share the basic idea of something being in or moving toward the middle or center point.

English speakers can easily remember 'centro' by connecting it to several similar English words like 'center', 'central', 'concentrate', and 'centrifuge'. All these words come from the same Latin root 'centrum'. The connection is clear both in spelling and meaning - they all relate to the concept of a middle point or focusing toward the middle.