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treacherous

adjective · /ˈtɹɛtʃəɹəs/ · Level 3 · Advanced

What does treacherous mean?

treacherous (adjective): dangerously unstable and unpredictable.

Definition: Princeton WordNet 3.1.

How do you use treacherous in a sentence?

How do you pronounce treacherous?

/ˈtɹɛtʃəɹəs/ (IPA, American English). The app reads every word aloud.

Where does treacherous come from?

From Old French trecheros, tricheros (“deceitful”), equivalent to treacher + -ous.

Etymology: Wiktionary, CC BY-SA 4.0.

Test yourself: do you know “treacherous”?

Tap an answer to check it. The same questions the app asks.

What does “treacherous” mean?

likely or expected to happen or become

Not quite: that's what prospective means.

foreign, especially in an exciting way

Not quite: that's what exotic means.

of the same origin as claimed; genuine

Not quite: that's what authentic means.

dangerously unstable and unpredictable

Right! That's what “treacherous” means.

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