(pathology, neurology) sciatica

synthpop

(music) symphony / (figuratively) something composed of diverse elements, something in harmony

exerting oneself to the utmost, doing one's best

粉骨砕身: exerting oneself to the utmost, doing one's best

people working together with one mind

motor nerves / (figuratively) reflexes

songbun (a system of ascribed status in North Korea, based on one's political, social, and economic background and the behaviour of relatives)

the Neolithic

nanshin, Imperial Japan's policy of southern expansionism towards southeast Asia and the Pacific Islands