minefield

noun4

1. •
   An area in which land mines or naval mines have been laid.
2. •
   (figurative) A matter or situation presenting multiple risks, dangers, complications or difficulties.

   • Be careful. Foreign property investments are a minefield, and some people have lost a lot of money.
   • Russian grammar can be a minefield.
3. •
   A pitch that has dried out and crumbled and on which the ball is bouncing and spinning unpredictably.
4. •
   A quiz that terminates when the test-taker answers a question incorrectly.