délivrer, libérer, relâcher, réformer {ww.} to free
to release
to liberate
Il leur ordonna de libérer le prisonnier.
He ordered them to release the prisoner.
Il leur ordonna de libérer les prisonniers.
He ordered them to release the prisoners.
améliorer, réformer, amender {ww.} to improve
to amend
to ameliorate
to upgrade
to enhance
J'aimerais améliorer ma prononciation de l'anglais.
I would like to improve my English pronunciation.
Si tu fais des efforts, tu peux améliorer ton anglais.
You can improve your English if you try.