fā​suān

to turn sour

发酸 發酸 fā//suān
to turn sour
to ferment and develop a sour taste; to become acidic
to sting
to feel a tingling or stinging sensation in the eyes or nose, usually when about to cry
发酸 發痠 fā​suān
to feel achy
to feel sore, tired, or weak in the limbs or body

Frequency

Movie subtitles
0.150 per million appears in 0% of films
Written text
0.742 per million

Sources