(medicine) occur primarily in

(seismology) hypocenter / (figuratively) The geographical area in which an ongoing disaster, illness, crisis, or other destructive event is currently most severe.

limit, restrict / qualify

social status, personal wealth / (law) Short for 分限処分. jurisdiction

to limit, to restrict

oath, declaration

declare publicly

river source, headstream, headwaters / source of something such as a civilization or culture

root, cause, source, origin

(dated) Suwon (a city in South Korea)