chemical combination

chemically combine, bind

chemistry (branch of natural science)

adverbial form of よい (yoi, “good”) / adverbial form of いい (ii, “good”) / 良く, 善く, 克く: good, well / 良く: frequently, often / 良く, 善く: having astonishing ability or guts / 能く: (literary) able to

浴室: bathroom

well done; good job

(emphatic) Alternative form of よく (yoku)

chemistry (branch of natural science)

use one thing for many purposes / work someone hard

to use one's head