'calmamente' originates from Spanish, specifically the word 'calma' + suffix '-mente', where 'calma' comes from Late Latin 'calma' (from Greek 'kauma') and '-mente' comes from Latin 'mentem' meaning 'mind' or 'manner'.

'calmamente' changed from the Spanish construction 'calma' + '-mente' (an adverbial suffix). The root 'calma' traces back through Late Latin 'calma' (from Greek 'kauma') and developed into the modern Spanish forms before the adverbial '-mente' was appended.

Initially, the root 'calma' referred to a state (originally linked to heat-induced languor), but over time it shifted to mean 'calm' and the adverb 'calmamente' evolved to mean 'in a calm manner'.