noun, の adjective
The kanji and the word are exactly the same. A lie is a lie!
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You learned with reading with the kanji, so you should be able to read it already!
It's not true, is it?
My motto is, "I will not tell a lie."
Saying you won 100 million yen in the lottery sounds like a lie, I can't believe that!