'answeringly' originates from English, formed from the verb 'answer', which ultimately derives from Old English 'andswaru', where 'and-' meant 'against' and 'swaru' meant 'a sworn response'.

'answeringly' developed by attaching the adverbial suffix '-ly' to the present participle 'answering' (Middle English forms include 'answeryng'/'answaring'), producing the adverbial form in Early Modern English usage.

Initially used simply to indicate 'in answer' or 'as a reply'; over time it has come to mean 'in a responsive manner' and is now rare/archaic in modern usage.