loophole
ˈluːphəʊl/
noun
- 1.an ambiguity or inadequacy in the law or a set of rules."they exploited tax loopholes"
synonyms: means of evasion/avoidance, means of escape, escape clause, escape route; More - 2.historicalan arrow slit in a wall.
synonyms: hole, gap, opening, aperture, chink, slit, slot "loopholes in the walls"