The Spanish verb 'matar' (to kill) traces back to the Latin word 'mactus', which meant 'honored' or 'dignified', specifically when referring to sacrificial offerings. This evolved into the Latin verb 'mactare', meaning 'to sacrifice' or 'immolate'. In Vulgar Latin, the word became 'mattare' with a more direct meaning of 'to strike' or 'kill', losing its specific religious connotations. This finally evolved into the modern Spanish 'matar'.

This etymology shows an interesting semantic shift from religious sacrifice to the more general concept of killing, while the word itself underwent relatively minor phonetic changes from Latin to Spanish.

The Spanish word 'matanza' (slaughter or massacre) is directly derived from 'matar'. Another related word is 'matador', literally meaning 'killer', which specifically refers to a bullfighter who kills the bull in a bullfight. These words maintain the core meaning of killing or causing death.

While English doesn't have many common words directly related to 'matar', we do use the Spanish loanword 'matador'. The English word 'immolate' (to kill as a sacrifice) comes from the same Latin root 'mactare', though it followed a different path through French and maintains more of the original sacrificial meaning.