'atomically' originates from English, specifically the adjective 'atomic' combined with the adverbial suffix '-ally', where '-ally' meant 'in the manner of'.

'atomic' changed from Late Latin word 'atomicus' and Greek word 'atomikos' (from 'atomos'), and eventually became the modern English adjective 'atomic'; 'atomically' developed by adding the adverbial suffix '-ally' to 'atomic'.

Initially, the root meant 'uncut' or 'indivisible' (from Greek 'atomos'), but over time it evolved to refer both to 'relating to atoms' and to the abstract sense 'in an indivisible way' (as used in computing).