The Spanish word 'mensaje' (meaning 'message') traces back to the Latin verb 'mittere', which meant 'to send'. From this verb came its past participle 'missus' meaning 'sent'. This Latin form evolved into Old Occitan 'messatge', which then made its way into Spanish as 'mensaje'. The connection between 'sending' and 'message' is quite intuitive - a message is something that is sent from one person to another.

Several common Spanish words share this Latin root of 'mittere' (to send): 'emisora' (broadcasting station), 'misión' (mission), 'remitente' (sender), and 'transmitir' (to transmit). All these words maintain some connection to the concept of sending or transmitting something.

Many English words are related to 'mensaje' through the same Latin root 'mittere': 'message' (obviously!), 'mission', 'missile' (something sent through the air), 'transmit', 'emit', 'permit' (literally 'to send through'), 'commit', and 'submit'. All these words carry some notion of sending or movement, though some meanings have become more abstract over time.