The Spanish word 'misa' (meaning 'mass' or 'religious service') comes from the Latin word 'missa', which meant 'sent' or 'dismissal'. This Latin word was derived from 'mittere', meaning 'to send'. The connection to religious services comes from the closing words of the Latin Mass 'Ite, missa est' ('Go, it is the dismissal'). Over time, the word that originally referred to the dismissal at the end came to represent the entire religious service itself.

Some related Spanish words include 'misión' (mission) and 'mensaje' (message), which also derive from the same Latin root 'mittere' meaning 'to send'. These words maintain the core concept of sending or transmitting something, whether it's people on a mission or conveying information through a message.

Several English words share this Latin ancestry, including 'mission', 'message', 'missile', and 'mass' (the religious service). All these words trace back to the Latin 'mittere' (to send). You can see how the idea of 'sending' remains in words like 'missile' (something sent through the air) and 'message' (information sent to someone), while 'mass' developed similarly to Spanish 'misa' to refer to the religious service.