She regretted spreading untruths about her colleague after learning the real story.

Her repeated untruthfulness eroded the trust of everyone on the team.

Her untruthful statement complicated the investigation.

Spreading even a small untruth can damage someone's reputation more than you expect.

Even after the evidence was presented, the untruther continued to deny the facts and spread lies.

At the town hall, the untruthers drowned out factual testimony with loud, baseless claims.

She answered the investigator untruthfully, hoping to avoid suspicion.

The untruthiness of his testimony ultimately undermined the jury's trust.