1.
pitfall, trap hole
A concealed hole in the ground designed to trap animals or people who step on it.
2.
pitfall, hidden danger, trap
A hidden risk, unexpected problem, or deceptive situation that catches someone off guard.
Compound of 落とす (to drop) + 穴 (hole). The figurative sense (hidden danger) is more common than the literal sense in everyday use.
Common patterns
- 落とし穴にはまる: to fall into a trap/pitfall
- 落とし穴に気をつける: to watch out for pitfalls
- ~には落とし穴がある: there is a pitfall in ~
- 思わぬ落とし穴: an unexpected pitfall
- 落とし穴を掘る: to dig a pitfall trap (literal)
Similar words
- わな: trap, snare — can be physical or figurative
- 陥いれる: to trap someone, to entrap
- 落とし穴 specifically implies something hidden that you don't notice until it's too late