他的病发作了。
His illness flared up.
发作
to flare up; to break out
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.
发
作
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.
发
See it in sentences
脾气发作起来吓人。
His temper is scary when it flares.