To tell a lie; to say something that is not true (ranging from a small fib to a serious falsehood).
子どもが宿題を忘れたと言ったが、先生は嘘をついていると気づいた。
The child said they forgot their homework, but the teacher realized they were lying.
面接で履歴書の事実を誇張して嘘をつくのはよくない。
It's not good to lie or exaggerate facts on a résumé during an interview.
彼は冗談で嘘をついただけだと言った。
He said he only told a lie as a joke.
嘘をつくと信頼を失うことが多い。
Lying often causes you to lose trust.