Finely

wiktionary

From Middle English finely, fynely, fynly, fineliche, finliche, fynliche, equivalent to fine +‎ -ly.

finely (adv.)

early 14c., "perfectly, completely," from fine (adj.) + -ly (1). Meaning "delicately, minutely" is from 1540s; that of "excellently" is from 1680s.