mendacious
men-DAY-shusadjMeaning lying; not telling the truth
Memory hook MEND-acious: he MENDS his story with lies. Caught beside the empty pie plate, Jonah mends his story again and again: “A dog ate it! No, a bird!” Every patch is a lie; he is mendacious.
The mendacious knight told the queen he had slain the dragon, though he had never left the castle.
In context The witness seemed calm and sure, yet her story proved mendacious: the bus she said she took had not run that day, and the shop she named had closed years before.
Similar lying, dishonest, untruthful, deceitful
Opposite honest, truthful, candid
From Latin mendax, “lying, false.”