olemus
Wiktionary, verb:
2. (transitive) to restore (someone or something) to its proper condition; to straighten out, to set right
3. (transitive) to remedy or fix (an undesirable state of affairs, situation etc.)
to rectify the crisis
5.(transitive) to correct or amend (a mistake, defect etc.)

näiteid
https://en.wikipedia.org/wiki/Image_rectification
https://en.wikipedia.org/wiki/Rectification_(law)
rectify an account -- kontoparandust tegema
rectify faults -- vigu/puudusi kõrvaldama