Untruth.
The opposite of truthful is deceitful or dishonest.
The opposite of a liar is someone who is truthful or honest.
Truthful means telling or expressing the truth. When someone is being truthful it means they are doing the exact opposite of lying and the information they are saying should be trusted.
The opposite of deceive is to 'disclose' and/or 'enlighten.'
fairly, lawfully, legally, legitimately, honorably, honestly, decently, ethically,
Dative; Truthful Comparative; More truthful Superlative; Most truthful.
More truthful and most truthful, respectively.
"you are not truthful"
yes it is truthful.
'Truthful' is an adjective 'truthfully,' is the adverb. In the English language 99% of adverbs end in '---ly'.
He was truthful as he explained what had happened. She was not truthful as she attempted to frame him for the crime.
My sister is really truthful.