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
Combined with a light glaze of ice that could fall before temperatures drop, travel in the area could be treacherous that day, the weather service said.
—
Sean Murphy and Russ Bynum, Los Angeles Times, 15 Mar. 2025
The legendary Stadium, Mountain, and Dunes courses now have bigger and faster greens as well as more treacherous hazards.
—Passport By Forbeslife, Forbes, 14 Mar. 2025
Navigating heavy rain: Essential safety measures for wet roads
When heavy rain pours, the risk of flooding and treacherous roads rises.
—Bay Area Weather Report, The Mercury News, 12 Mar. 2025
The bridge could easily have collapsed after testing showed on Jan. 31 that nearly half of its pillars had signs of moderate-to-severe decay — a treacherous scenario.
—Nick Rosenberger, Idaho Statesman, 11 Mar. 2025
See All Example Sentences for treacherous
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Sean Murphy and Russ Bynum, Los Angeles Times, 15 Mar. 2025
The legendary Stadium, Mountain, and Dunes courses now have bigger and faster greens as well as more treacherous hazards.
—Passport By Forbeslife, Forbes, 14 Mar. 2025
Navigating heavy rain: Essential safety measures for wet roads
When heavy rain pours, the risk of flooding and treacherous roads rises.
—Bay Area Weather Report, The Mercury News, 12 Mar. 2025
The bridge could easily have collapsed after testing showed on Jan. 31 that nearly half of its pillars had signs of moderate-to-severe decay — a treacherous scenario.
—Nick Rosenberger, Idaho Statesman, 11 Mar. 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 22 Mar. 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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