枕を濡らす（まくらをぬらす）

Japanese vocabulary

Meaning: to cry in bed; to cry oneself to sleep; to weep secretly in bed; to moisten one's pillow (with one's tears)

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “枕を濡らす” pronounced in real videos (YouGlish)