'self-healed' originates from the combination of 'self' and 'heal', where 'self' refers to one's own and 'heal' means to make healthy or whole.

'self-heal' changed from the Old English word 'hælan' meaning 'to make whole' and eventually became the modern English word 'heal'.

Initially, it meant 'to make whole or healthy', and over time it evolved into its current meaning of 'having healed itself'.