Lie
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!
嘘ですよね？
It's not true, is it?
「嘘をつかない」は私のモットーです。
My motto is, "I will not tell a lie."
宝くじで1億円当たったなんて、嘘の話みたいで信じられない！
Saying you won 100 million yen in the lottery sounds like a lie, I can't believe that!