zī​yīn

to nourish yin

滋阴 滋陰 zī​yīn
to nourish yin
In traditional medicine, to treat a deficiency of 'yin' (vital essence) by replenishing body fluids and blood.
yin-nourishing medicine
In traditional Chinese medicine, drugs or prescriptions (mostly sweet and cool/cold) used to increase body fluids and treat internal heat caused by yin deficiency.