treacherous
treac·he·rous
adjective
1.
dangerously unstable and unpredictable
- “treacherous winding roads”
- “an unreliable trestle”
2.
tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans
- “Punic faith”
- “the perfidious Judas”
- “the fiercest and most treacherous of foes”
- “treacherous intrigues”
Origin
From Old French trecheros, tricheros (“deceitful”), equivalent to treacher + -ous. See treacher.
Phrases
- treacherous turn
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.