发作 (fā zuò)

to flare up; to break out

Character breakdown

发 (fā) · 5 strokes

Simplified form of both 發 (send out) and 髮 (hair). Visually similar to 犮, the bottom component of 髮.
作 (zuō) · 7 strokes

Phonosemantic compound. 亻 represents the meaning and 乍 represents the sound.