a king, especially one who is not East Asian or was East Asian in pre-imperial times; in China and Vietnam, generally a king before Qin Shi Huangdi who invented the title 皇帝 (kōtei, “huangdi; emperor”); in Korea, one of the many kings before the Korean Empire which was modeled after Japan's; in Japan, one of the rulers before Emperor Jinmu

the King of the Underworld; either Hades/Pluto in ancient Greco-Roman mythology or King Yama in Hindu-Buddhist belief.

切ない: painful, trying or oppressive

a female given name

刹那: instant, moment

roughly 0.11 seconds, defined as 1/65ᵗʰ of a 弾指 (danshi), where a danshi is 1/12,000ᵗʰ of a day or 7.2 seconds / 0.002 seconds, defined as 1/60ᵗʰ of a 念 (nen), where a nen is 1/60ᵗʰ of a 弾指 (danshi)

dark / underworld; the world of dead people

冥王星: Pluto

king

(archaic) an ancient Korean king