'nutritiously' originates from Latin, specifically the word 'nutrīre,' where 'nutrīre' meant 'to nourish.' The suffix '-ous' forms adjectives, and '-ly' forms adverbs.

'nutrīre' changed from the Latin word to the English 'nutritious' (adjective), and with the addition of '-ly,' it became the modern English adverb 'nutritiously.'

Initially, it meant 'in a nourishing manner,' and this meaning has remained the same in modern usage as 'in a way that provides nourishment.'