One of the mysteries of the English language finally explained.
1‘the engine backfired’
2‘Bernard's plan backfired on him’
rebound, boomerang, come back, have an adverse effect
have unwelcome repercussions for, cause one to be hoist with one's own petard, be self-defeating, be counterproductive
fail, miscarry, go wrong
informal blow up in someone's face
archaic redound on
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