薄い: thin; weak; diluted

雨水: rainwater

碓氷, 碓井, 碓日, 臼井: a place name / 臼井: a surname / 雨水: the second solar term

用水: cistern water, irrigation water / 羊水: amniotic fluid / 揚水: water pumping

増水: rising water

王水: aqua regia

mortar

light (in degree)

a box with legs that is carried on the back, used by itinerant monks and yamabushi to carry books, articles of worship, clothing, etc.

tailwind / (figuratively) favorable circumstances