'amerimnon' originates from Greek, specifically the word 'ἀμέριμνος', where 'ἀ-' meant 'without' and 'μέριμνα' meant 'care or worry'.

'ἀμέριμνος' transformed into the English word 'amerimnon' through direct borrowing from Greek.

Initially, it meant 'without care or worry', and this meaning has largely remained the same in modern usage.