plural treacheries
1
: harmful things that are done usually secretly to a friend, your own country, etc.
a tale of treachery and revenge
2
: an act of harming someone who trusts you
She was deeply hurt by her husband's treacheries. [=her husband's treacherous acts]
Cite this Entry
“Treachery.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/treachery. Accessed 21 Jun. 2026.
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