An untruth is a lie. The Advertising Standards Authority accused estate agents of using blatant untruths I have never uttered one word of untruth. = falsehood. a lie - used when you want to avoid saying the word 'lie'
If someone is untruthful or if they say untruthful things, they are dishonest and say things that they know are not true. He must not be untruthful, or a coward Some people may be tempted to give untruthful answers. truthful. dishonest or not true