发虚

发虚	fā xū	to feel weak / to be diffident
发	fā	to send out / to show (one's feeling) / to issue / to develop / to make a bundle of money / classifier for gunshots (rounds)
发	fà	hair / Taiwan pr. [fa3]
虚	xū	emptiness / void / abstract theory or guiding principles / empty or unoccupied / diffident or timid / false / humble or modest / (of health) weak / virtual / in vain