发热 (fā rè)

to have a high temperature; feverish; unable to think calmly; to emit

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.
热 (rè) · 10 strokes

Simplified form of 熱. Phonosemantic compound. 灬 represents the meaning and 埶 represents the sound.