'measuredly' originates from English, specifically formed from the adjective 'measured' plus the adverbial suffix '-ly'; 'measured' itself comes from Old French 'mesuré', ultimately from Latin 'mensuratus', where the root 'mens-' related to 'measuring'.

'measuredly' developed from the adjective 'measured' (Middle English and Old French 'mesuré'), which derived from Old French 'mesure'/'mesuré' from Latin 'mensura' (a measuring) and the verb 'metiri'/'mensurare' (to measure); the adverbial suffix '-ly' was added in later English to form the adverb.

Initially related to the idea of 'measuring' or 'taking measure', the sense shifted to describe behavior that is 'measured'—i.e., restrained or deliberate—and thus 'measuredly' came to mean 'in a restrained or deliberate manner'.