backfire -
When a plan fails, and it has the opposite result of what was intended.
The politician tried to hide his assets, in order to appear like a common man. But his plan backfired when they were revealed, and people saw that he was a liar.
audio
38 of38 Bad /
Mistake
verb
bungle -
Carry out a task clumsily or incompetently, leading to failure or an unsatisfactory outcome
The painter bungled his job when he misspelled the word on the road sign.