'balancingly' originates from English, specifically the word 'balance' with the gerund-forming suffix '-ing' and the adverbial suffix '-ly'.

'balance' came into Middle English from Old French 'balance' (the pair of scales) and from Late Latin 'bilancia' (a pair of scales), ultimately related to Latin elements such as 'bis' (two) and 'lanx' (pan, plate). The modern English adjective and verb forms developed from these earlier nouns and verbs, to which English added '-ing' and '-ly' to form the adverb.

Initially, 'balance' referred specifically to a pair of scales or the act of weighing; over time it broadened to mean 'a state of evenness or stability' and was extended figuratively. 'Balancingly' carries this sense of producing or maintaining equilibrium.