Treacherous

/ˈtrɛtʃ.ər.əs/

Meaning & Definition

adjective

Dangerous and unpredictable; likely to betray trust.

The treacherous path through the mountains was filled with loose rocks and steep drops.

Characterized by hidden dangers or hazards.

The treacherous waters of the river made it impossible for boats to navigate safely.

Guilty of or involving betrayal or deception.

His treacherous behavior eventually led to his downfall when his colleagues discovered his schemes.

Not able to be trusted; likely to be disloyal.

She found it hard to forgive him after his treacherous actions during the negotiation.

Middle English trecherous, from Old French trecher, from trecheur, meaning 'to betray'

treacherous ground

Refers to a situation that is unstable or dangerous.

a treacherous ally

Someone who appears to be on your side but is actually harmful.

treacherous waters

Waters that are unpredictable and potentially harmful, often used metaphorically.

betray

To be disloyal or unfaithful.

perilous

Full of danger or risk.

deceptive

Giving an appearance different from the true one.

shady

That deal sounds shady; I wouldn’t trust it.

two-faced

Watch out for her; she’s really two-faced.