The Spanish word 'ninguno' meaning 'none' or 'no one' comes from Old Spanish 'neguno', which developed from the Latin phrase 'nec unus'. This Latin phrase was a combination of 'nec' meaning 'and not, nor' and 'unus' meaning 'one', literally meaning 'not one'. Over time, the Latin 'nec unus' evolved phonetically through Old Spanish 'neguno' to become modern Spanish 'ninguno', while maintaining its original meaning of 'not one' or 'none'.

Some related Spanish words include 'ni' (meaning 'nor, not even'), which also comes from Latin 'nec', and 'uno' (meaning 'one'), which comes from Latin 'unus'. Understanding these connections can help you see how 'ninguno' literally means 'not one'.

The English word 'unity' and the prefix 'uni-' (as in 'uniform', 'unique', 'universe') are related to 'ninguno' through the Latin word 'unus' meaning 'one'. While 'ninguno' took on a negative meaning by combining with 'nec', these English words maintained the basic concept of 'oneness'.