1. Land or ground that is dangerous, unstable, or deceptive, presenting hidden hazards or risks to those traversing it
The mountain climbers faced treacherous terrain with loose rocks and steep cliffs.
Os alpinistas enfrentaram um terreno traiçoeiro com rochas soltas e penhascos íngremes.
2. Figuratively, a difficult or hazardous situation that is hard to navigate or predict
The politician must navigate treacherous terrain as he campaigns for re-election.
O político deve navegar por um terreno traiçoeiro enquanto faz campanha para sua reeleição.