Definition

This word describes something that is dangerous or deceptive, often because it cannot be trusted or relied upon. It can refer to people who betray trust or to situations that are hazardous and unpredictable.

Example

The treacherous path through the mountains made the hike very risky.

Conversation

Have you heard about those hiking trails near the lake?

Yeah, but I’ve heard some of them are pretty treacherous.

Exactly! I’m not sure if I want to risk it without a guide.

Smart choice! Better to stay safe than get caught in treacherous conditions.

Synonyms & Antonyms

Root Explanation

Treacherous → It is formed from "treachery" (from Old French *trecherie*, meaning betrayal or deceit) and the suffix "-ous" (meaning full of). The word "treacherous" describes someone full of betrayal or deceitful behavior.

Memory Tip

Think of 'treachery' as betrayal, and remember that 'treacherous' means full of betrayal or deceit.

Visually Confused Words