Here are some examples of how "lose" can be used in a sentence, showing its various meanings:
* Lose something: "I lost my keys." (Meaning: I can't find my keys anymore)
* Lose a game: "Our team lost the game." (Meaning: We were defeated in the competition)
* Lose weight: "I've been trying to lose weight." (Meaning: I'm trying to become thinner)
* Lose your temper: "He lost his temper and shouted at me." (Meaning: He became angry)
* Lose track of time: "I got so engrossed in the book that I lost track of time." (Meaning: I didn't notice how much time had passed)
* Lose heart: "Don't lose heart, you're doing great!" (Meaning: Don't give up hope)
* Lose touch with: "I've lost touch with my old friends." (Meaning: I don't communicate with them anymore)
To understand the meaning of "lose" in a sentence, you need to pay attention to the context and the other words around it.