to have the opposite result of what was intended
avoir le résultat opposé de ce qui était prévu (avoir le résultat opposé de ce qui était prévu)
"His plan backfired and made things worse."
"Son plan a échoué et a empiré les choses." (son plan a échoué et a empiré les choses)
to be knowledgeable or skilled about something
to be extremely surprised or frightened
to do something differently from tradition
to respond to a responsibility or opportunity
recovered and healthy again
people living or working together in harmony