κατόρθωμαkatórthōma

something made fully upright, i.e. (figuratively) rectification (specially, good public administration)

Greek (New Testament) · G2735

Meanings

a right action, a successful achievement; plur. of wholesome public measures: Acts xxiv. 2 (3) [R G].*

Same root

κατάkatá · G2596(prepositionally) down (in place or time), in varied relations (according to the case (genitive, dative or accusative) with which it is joined)
ὀρθόςorthós · G3717right (as rising), i.e. (perpendicularly) erect (figuratively, honest), or (horizontally) level or direct
διόρθωσιςdiórthōsis · G1357rectification, i.e. (specially) the Messianic restauration

Source: J. H. Thayer, Greek-English Lexicon of the New Testament (1889), public domain.