| Mot | Nuance | Exemple |
| failure | échec (général) | *Failure is part of learning.* |
| a fail (informel) | un “fail” | *That was a total fail.* |
| setback | revers/contretemps (temporaire) | *We had a small setback.* |
| defeat | défaite (compétition) | *A narrow defeat.* |
| loss | perte (match, business) | *Their first loss of the season.* |
| flop (informel) | flop (succès public raté) | *The show was a flop.* |
| disaster | catastrophe (très fort) | *The launch was a disaster.* |
| fiasco (B2) | fiasco (mauvaise organisation, ridicule) | *It turned into a fiasco.* |
| Verbe | Nuance | Exemple |
| to fail | échouer (ne pas réussir) | *I failed the exam.* |
| to fail to + V | ne pas réussir à / ne pas faire | *He failed to reply.* |
| to miss | rater (bus, deadline, occasion) | *I missed the deadline.* |
| to mess up (informel) | se planter / mal faire | *I messed up the presentation.* |
| to screw up (plus familier) | se planter (plus cru) | *I screwed up.* |
| to fall short | être en dessous des attentes | *The result fell short of our goals.* |
| to backfire | se retourner contre soi | *My joke backfired.* |
| to collapse | s’effondrer (plan/projet) | *The deal collapsed.* |
| Mot | Nuance | Exemple |
| mistake | erreur (courant) | *I made a mistake.* |
| error | erreur (technique/formel) | *There was an error in the report.* |
| fault | faute/responsabilité | *It wasn’t my fault.* |
| blunder (B2) | grosse bourde | *A major blunder.* |
| misjudgment (B2) | mauvaise évaluation | *It was a misjudgment.* |
| negligence (B2) | négligence (pro/légal) | *gross negligence* |
| Mot | Nuance | Exemple |
| unsuccessful | non concluant (neutre) | *The attempt was unsuccessful.* |
| ineffective | inefficace | *The strategy was ineffective.* |
| not enough | insuffisant (simple) | *It wasn’t enough.* |
| inadequate (B2) | inadéquat/insuffisant (formel) | *Inadequate preparation.* |
| subpar (B2, plutôt US) | en dessous du niveau | *The service was subpar.* |
Complète avec : failure / setback / flop / fiasco / fail / miss / mess up / fall short / backfire / blunder / misjudgment / inadequate
The project wasn’t a total ; we learned a lot.
We had a small but we’re back on track.
The film was a box-office .
The event turned into a complete (badly organised).
I’m afraid I might the exam.
I the deadline by two days.
I really my speech (informal).
The result of our expectations.
His comments and made things worse.
That was a huge — everyone noticed.
Hiring him was a .
Our preparation was .
failure
setback
flop
fiasco
fail
missed
messed up
fell short
backfired
blunder
misjudgment
inadequate