untrue
adjectiveUK /ʌnˈtruː/
US /ʌnˈtruː/
Not true or not real.
The story he told was untrue.
OTHER MEANINGS
2. Not loyal or faithful to someone.
He was untrue to his friends.
3. Not matching the facts or reality.
Her claim about the test was untrue.
4. Not honest or sincere.
His smile felt untrue.