treacherous
treach|er|ous /tr'etʃərəs/
1 [ADJ]
If you describe someone as treacherous, you mean that they are likely to betray you and cannot be trusted.
He publicly left the party and denounced its treacherous leaders...
2 [ADJ]
If you say that something is treacherous, you mean that it is very dangerous and unpredictable.
The current of the river is fast flowing and treacherous...
1 [ADJ]
If you describe someone as treacherous, you mean that they are likely to betray you and cannot be trusted.
He publicly left the party and denounced its treacherous leaders...
2 [ADJ]
If you say that something is treacherous, you mean that it is very dangerous and unpredictable.
The current of the river is fast flowing and treacherous...