treacherous
adjective
treach·er·ous
ˈtre-chə-rəs 
ˈtrech-rəs
1
a
: likely to betray trust : unreliable
a treacherous memory
b
: providing insecure footing or support
treacherous quicksand
c
: marked by hidden dangers, hazards, or perils
2
: characterized by or manifesting treachery : perfidious
treacherously
adverb
treacherousness
noun
Examples of treacherous in a Sentence
a treacherous act of betrayal
They were not prepared to hike over such treacherous terrain.
The snow made their hike all the more treacherous.
Discussions about money can lead couples into treacherous territory.
Recent Examples on the Web
The match ended when Heyman turned on both Punk and Reigns with a pair of treacherous low blows on each.
—
Alfred Konuwa, Forbes.com, 20 Apr. 2025
In February, Star residents and City Council members clashed over competing needs for a new school and improvements to a treacherous road, with the school proposal winning out.
—Rose Evans, Idaho Statesman, 16 Apr. 2025
Mendoza was part of a team of Navy SEALs who, one day in November 2006, were sent into an apartment building in Ramadi province, Iraq, on a treacherous surveillance mission.
—Stephanie Zacharek, Time, 11 Apr. 2025
Gaining access to the caves was a treacherous task.
—Paul Smaglik, Discover Magazine, 10 Apr. 2025
See All Example Sentences for treacherous
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Alfred Konuwa, Forbes.com, 20 Apr. 2025
In February, Star residents and City Council members clashed over competing needs for a new school and improvements to a treacherous road, with the school proposal winning out.
—Rose Evans, Idaho Statesman, 16 Apr. 2025
Mendoza was part of a team of Navy SEALs who, one day in November 2006, were sent into an apartment building in Ramadi province, Iraq, on a treacherous surveillance mission.
—Stephanie Zacharek, Time, 11 Apr. 2025
Gaining access to the caves was a treacherous task.
—Paul Smaglik, Discover Magazine, 10 Apr. 2025
See All Example Sentences for treacherous
Cite this Entry
“Treacherous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/treacherous. Accessed 25 Apr. 2025.
Copy CitationKids Definition
treacherous
adjective
treach·er·ous
ˈtrech-(ə-)rəs
1
a
: guilty of treachery
b
: likely to betray : unreliable
a treacherous memory
2
: giving a false appearance of safety or solidity
a treacherous stretch of bog
treacherously
adverb
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