The Spanish word 'invitación' (meaning 'invitation') comes from the Latin word 'invitatio', which had the same meaning. This Latin noun was derived from the verb 'invitare', meaning 'to invite'. The word maintained its form and meaning quite consistently as it evolved from Latin to Spanish, with the main change being the Spanish adaptation of the ending '-tio' to '-ción', which is a common pattern in Spanish words derived from Latin.

A simpler and very common related Spanish word is 'invitar' (to invite), which comes from the same Latin root 'invitare'. Spanish learners might also recognize 'invitado/a' (guest), which is the past participle of 'invitar' used as a noun. These words form a clear family of related terms all dealing with the concept of inviting and hospitality.

English speakers will easily recognize the connection to the English words 'invite' and 'invitation', which share the same Latin ancestry through French influence. The similarity in both form and meaning makes this an easy word for English speakers to remember. The parallel evolution of these words in both languages demonstrates their common Latin heritage.