set in

US /set ɪn/
UK /set ɪn/
"set in" picture
1.

يبدأ, يحل, يستقر

When something unpleasant or difficult sets in, it begins and seems likely to continue.

:
The rain set in for the entire weekend.
استمر المطر طوال عطلة نهاية الأسبوع.
Once the cold weather sets in, it's hard to get rid of it.
بمجرد أن يحل الطقس البارد، يصعب التخلص منه.
2.

يترسخ, يتغلغل

If a belief or habit sets in, it becomes fixed and difficult to change.

:
Once bad habits set in, they are hard to break.
بمجرد أن تترسخ العادات السيئة، يصعب كسرها.
A feeling of despair set in after the news.
شعور باليأس تغلغل بعد الأخبار.