Mendacious 🗣️
(adj.) not telling the truth; lying or deceitful.
Nan smiled sweetly, but her mendacious excuse for missing dinner—“I was stuck in traffic”—fell apart when we saw her beach photos. ⛱️😂
It traces back to:
Latin mendax (lying, deceitful), from mendacium (a lie), rooted in mendum (fault, defect)—the same root that gives us “emend” (to correct errors).
It entered English in the early 17th century, likely through learned/literary use, and has retained its formal, slightly elevated tone ever since ... which is why it tends to appear in writing more than everyday speech.
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