mistruthful in English dictionary mistruthful Meanings and definitions of "mistruthful" (rare) Untruthful; lying. adjective (rare) Untruthful; lying. more Grammar and declension of mistruthful mistruthful ( comparative more mistruthful, superlative most mistruthful) mistruthful (comparative more mistruthful, superlative most mistruthful) more Sample sentences with "mistruthful" Declension Stem Try again Authors