weak; in poor health
虚 (xū) · 11 strokes
Simplified form of 虛. Phonosemantic compound. 虍 represents the sound and 丘 represents the meaning.
弱 (ruò) · 10 strokes
Depicts two people urinating (尿). Based on the original meaning "urinate", now written as 尿/溺. The current meaning is a phonetic loan.