Do you know the phrase “to run out of steam“?
Look at the examples. Can you guess the meaning?
A: How was Peter’s presentation?
B: It started off well, but towards the end he ran out of steam. I think he was tired.
A: Are you still studying Russian?
B: Not really. I was very motivated at first, but it got really difficult. I ran out of steam after my second test.
A: Don’t give up! Everything is difficult until you get used to it!
Meaning: to lose energy, motivation or interest in something. 🙂