難問: difficult problem / 南門: south gate

これは何ですか: what is this?

self, oneself

(programming) syntactic sugar

(programming) syntactic sugar

sad, gloomy

植う: (Classical Japanese, archaic) to plant / 飢う, 餓う: (Classical Japanese, archaic) to starve, to be hungry

憂し: Classical Japanese form of 憂い (ui, “sad”)

大人: an honorific title for a scholar or teacher / 丑: Ox, second sign of the Chinese zodiac / 牛: cow, bull, ox, cattle; beef / 雨師: rain god / 齲歯: dental caries

納期: appointed time of delivery, date of delivery / 農期: farming season / 能記: (linguistics) signifier