Kyūjitai form of 聡慧: perspicacious, clear-eyed, clear-sighted, intelligent, wise

diatom

perspicacious, clear-eyed, clear-sighted, intelligent, wise

(idiomatic) A piece of cake; an extremely simple thing, something trivial, a cinch, easy as pie.

朝飯前: A piece of cake; an extremely simple thing.

(telephony) a common Japanese telephone greeting: hello; used when answering the telephone / used to confirm that the person being addressed is listening, or to confirm if anyone is listening

put away

the way in which something is in confusion or disorderly

薬用: medicinal use

手を焼く: have difficulty with, be put out