boomerang

US /ˈbuː.mə.ræŋ/
UK /ˈbuː.mə.ræŋ/
1.

回旋镖

1.

回旋镖

If a plan boomerangs, it brings a harmful result instead of the intended good one:

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Our plan to take over the business could boomerang on us if we're not careful.