'unwholesomely' is formed from the adjective 'unwholesome' with the adverbial suffix '-ly'. 'Unwholesome' itself comes from the prefix 'un-' meaning 'not' and 'wholesome', which means 'conducive to health or moral well-being'.

'Unwholesome' comes from Middle English 'unholsom', from 'un-' (not) + 'holsom' (wholesome), and the adverbial form 'unwholesomely' was created by adding '-ly'.

Initially, it meant 'in a way that is not healthy or beneficial', and this meaning has remained consistent in modern usage.