Synonyms for treacherous
- adjective
Most common
Synonyms by meaning
Adjective
1. Perfidious — deceitful; inclined to betray
perfidious, traitorous, deceitful, unfaithful, insidious, slippery, devious, double-dealing, disloyal, double-crossing, faithless, untrustworthy, wily, fraudulent, treasonous, false, untrue, dishonest, deceptive, double-faced, renegade, false-hearted
2. Dangerous — unreliable; dangerous
dangerous, unsafe, perilous, wicked, risky, hazardous, precarious, tricky, unsound, jeopardous, unstable, shaky, insecure, parlous
Other
Definitions
- adj. 1
Deceitful; inclined to betray.
- adj. 2
Unreliable; dangerous.
a treacherous mountain trail
Related words
- Word family
- treacherously treacherousness treacher treachery
- Is a kind of
- deceptive disobedient evil wily
Example sentences
- unfaithful Dan discovered that his wife had been unfaithful.
- deceitful I learned the hard way that silence can be deceitful.
- perfidious I discovered Troy's perfidious plans.
- dangerous You shouldn't have gone to such a dangerous place.
- unsafe Do you really think it would be unsafe to do that?
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| treacherous | rising | |
| unfaithful | rising | |
| deceitful | rising | |
| traitorous | rising | |
| perfidious | steady | |
| dangerous | steady |
Use in printed books, per decade from 1850 to 2019.
By length
- 4 letters
- wily2
- 5 letters
- false1, risky2, shaky2
- 6 letters
- wicked2, tricky2, unsafe2, untrue2
- 7 letters
- devious3, unsound2, parlous
- 8 letters
- unstable3, insecure3, slippery3, renegade3, perilous3, disloyal3
- 9 letters
- dangerous3, hazardous3, dishonest3, deceptive3, insidious4, deceitful3, faithless
- 10 letters
- fraudulent3, unreliable5, precarious4, unfaithful3, traitorous3, treasonous3, perfidious, jeopardous
- 13 letters
- untrustworthy4
The small number after each word is its number of syllables (wily2 = 2 syllables).
In other languages
- Français
- traître
- Italiano
- traditore
- Deutsch
- heimtückisch