1. to steal something:
to take something that belongs to another person without permission
- Somebody stole my phone.
- He was fired because he stole money from the company.
2. a liar:
a person who lies (usually often)
- Don't trust him. He is a liar.
- She is a liar. Don't believe what she says.
- Do you have proof that he stole your phone?
- We have no proof that aliens are real.