1
Core quality
Dishonest and given to lying or making deliberately false statements.
Example
The court rejected the witness's mendacious testimony.
mendacious
/menˈdeɪʃəs/ · men-DAY-shusadjective
Dishonest and given to lying or making deliberately false statements.
Use mendacious to express this relationship precisely: dishonest and given to lying or making deliberately false statements.
What mendacious Really Means
The word becomes easier to use when its closely related senses are separated and compared.
2
Attributive or predicative use
Use this adjective before a suitable noun or after a linking verb such as be or seem.
Example
A mendacious advertisement concealed the product's risks.
3
Analytical distinction
Choose it when this exact descriptive quality matters; a related word may overlap without conveying the same trait.
Example
The memoir is selective but not demonstrably mendacious.
Use mendacious Naturally
Notice how the surrounding noun or clause reveals the exact shade of meaning.
The court rejected the witness's mendacious testimony.
A mendacious advertisement concealed the product's risks.
The memoir is selective but not demonstrably mendacious.
Precision Matters
Mendacious overlaps with several common words, but each carries a different emphasis.
mendacious
vs.Means dishonest and given to lying or making deliberately false statements.
disingenuous
Means not candid or sincere, especially when pretending ignorance, innocence, or honesty.
mendacious
vs.Means dishonest and given to lying or making deliberately false statements.
candid
Means honest, direct, and unguarded in expression.
mendacious
vs.Means dishonest and given to lying or making deliberately false statements.
explicit
Means stated directly and with complete clarity.
mendacious
vs.Means dishonest and given to lying or making deliberately false statements.
incontrovertible
Means impossible to deny or dispute because the evidence is decisive.
Test mendacious in Context
The claim was knowingly false and dishonest.
1
Records proved that the spokesperson's ___ claim was not a mistake but a deliberate lie.