天不知不觉就黑了。
It got dark before we knew it.
不知不觉
(idiom) unconsciously; unwittingly
HSK 3.0 · Band 7 trad. 不知不覺
Watch it being written
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
不
知
不
觉
Nice writing!
Build with these blocks
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
不
知
不
See it in sentences
他不知不觉睡着了。
He fell asleep without noticing.