run out of steam
US /rʌn aʊt əv stiːm/
UK /rʌn aʊt əv stiːm/

1.
kehabisan tenaga, kehilangan semangat, menjadi kurang berkesan
to lose energy or enthusiasm and stop doing something, or to become tired and less effective
:
•
The project started strong, but it seems to be running out of steam now.
Projek bermula dengan kuat, tetapi nampaknya kehabisan tenaga sekarang.
•
After working for ten hours, I started to run out of steam.
Selepas bekerja selama sepuluh jam, saya mula kehabisan tenaga.