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
Synonyms
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
Moreover, the treacherous weather conditions also hampered efforts to fight the fires, as air crews were unable to operate due to strong gusts.
—
Ned Kleiner, Los Angeles Times, 10 Jan. 2025
With a winter storm warning in effect and a mix of snow and ice falling in North Texas, roads in the Dallas-Fort Worth area could become treacherous around midday Thursday, Jan. 9, and into Friday.
—Amy McDaniel, Fort Worth Star-Telegram, 9 Jan. 2025
On Thursday roads in Oklahoma City, Tulsa, Dallas Fort Worth, Little Rock and the Texas Hill Country may be treacherous.
—Nazaneen Ghaffar, New York Times, 7 Jan. 2025
Snow and ice made driving conditions treacherous and led to widespread delays and cancellations at airports.
—Christopher Cann, USA TODAY, 7 Jan. 2025
See all Example Sentences for treacherous 
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Ned Kleiner, Los Angeles Times, 10 Jan. 2025
With a winter storm warning in effect and a mix of snow and ice falling in North Texas, roads in the Dallas-Fort Worth area could become treacherous around midday Thursday, Jan. 9, and into Friday.
—Amy McDaniel, Fort Worth Star-Telegram, 9 Jan. 2025
On Thursday roads in Oklahoma City, Tulsa, Dallas Fort Worth, Little Rock and the Texas Hill Country may be treacherous.
—Nazaneen Ghaffar, New York Times, 7 Jan. 2025
Snow and ice made driving conditions treacherous and led to widespread delays and cancellations at airports.
—Christopher Cann, USA TODAY, 7 Jan. 2025
See all Example Sentences for treacherous
Dictionary Entries Near treacherous
Cite this Entry
“Treacherous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/treacherous. Accessed 18 Jan. 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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