set in
US /set ɪn/
UK /set ɪn/

1.
mulai, berlangsung
When something unpleasant or difficult sets in, it begins and seems likely to continue.
:
•
The rain set in for the entire weekend.
Hujan mulai turun sepanjang akhir pekan.
•
Once the cold weather sets in, it's hard to get rid of it.
Begitu cuaca dingin mulai, sulit untuk menghilangkannya.
2.
terbentuk, mulai muncul
If a belief or habit sets in, it becomes fixed and difficult to change.
:
•
Once bad habits set in, they are hard to break.
Setelah kebiasaan buruk terbentuk, sulit untuk dihilangkan.
•
A feeling of despair set in after the news.
Perasaan putus asa mulai muncul setelah berita itu.