experiment

lye, originally the clear alkaline liquid left after leaching wood ash in water / scum, the coagulated proteins and fats that gather on the surface of a pot of boiling food

ash

ashes / puckery juice / cremate

ash; ashes

(inorganic chemistry) caustic soda

Synonym of 炭酸水 (tansansui, “carbonated water”); soda water

to do an experiment

chemistry (branch of natural science)

use one thing for many purposes / work someone hard