'attunely' originates from English, specifically formed by adding the adverbial suffix '-ly' to the verb 'attune' (from 'at-' + 'tune').

'attune' developed in English from the prepositional prefix 'at-' (a variant of 'to') combined with 'tune' (from Old English/Middle English forms related to 'tunen'/'tunen', ultimately from Latin/Greek root 'ton-'/'tonos' meaning 'tone' or 'stretch'), and the adverbial form 'attunely' is a later English formation by adding '-ly'.

Initially, related forms meant 'to bring into musical tune' or 'to set the tone'; over time the meaning broadened to 'bring into harmony or into agreement/adjust to', and 'attunely' now means 'in a harmonized or responsive manner'.