The Spanish word 'inolvidable' (unforgettable) has an interesting journey from Latin roots. It starts with the Latin verb 'livisci' meaning 'to become dark', which combined with the prefix 'ob-' (against, in front) formed 'oblivisci' meaning 'to forget' - perhaps reflecting how forgotten things fade into darkness. This evolved into Vulgar Latin 'oblitare' and then Spanish 'olvidar' (to forget).

The adjective 'olvidable' (forgettable) was formed by adding the suffix '-ble' (meaning 'able to be') to 'olvidar'. Finally, the negative prefix 'in-' was added to create 'inolvidable', literally meaning 'not able to be forgotten' or 'unforgettable'.

A simpler and more common Spanish word that shares the same root is 'olvidar' (to forget). This is the base verb from which 'inolvidable' is derived. Another related word is 'olvido' (forgetfulness or oblivion). Understanding these connections can help you remember that 'inolvidable' essentially means 'unable to be forgotten'.

The English word 'oblivion' and its related forms like 'oblivious' share the same Latin ancestor 'oblivisci' with 'inolvidable'. While the Spanish word developed from the verb form meaning 'unforgettable', the English words maintained more of the sense of 'a state of being forgotten' or 'lacking awareness'. The connection becomes clearer when you think about how both relate to the concept of forgetting or fading from memory.