Read the dictionary definition of treacherous. All definitions for this word.
1. tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans
1. Punic faith
2. the perfidious Judas
3. the fiercest and most treacherous of foes
4. treacherous intrigues
2. dangerously unstable and unpredictable
1. treacherous winding roads
2. an unreliable trestle