set in

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

開始, 持續

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

:
The rain set in for the entire weekend.
持續了整個週末。
Once the cold weather sets in, it's hard to get rid of it.
一旦寒冷天氣來臨,就很難擺脫。
2.

養成, 油然而生

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

:
Once bad habits set in, they are hard to break.
一旦壞習慣養成,就很難改掉。
A feeling of despair set in after the news.
消息傳來後,絕望感油然而生