Meaning: こうそくn. (Kanji=光速) speed of light, permanent physical speed of the electromagnetic rays in space, unit of distance per time within which light moves (approximately 299, 792.5 kilometers per second/186, 200, 000 miles per second)n. (Kanji=拘束) restriction, restraint, constraintn. (Kanji=校則) school regulationsn. (Kanji=梗塞) stoppage, blockage; tightness; infarctionn. (Kanji=高速) high speed, great speed, very fast movement; high gearn. (Kanji=光束) beam, ray of lightn. (Kanji=高足) pupil who excels and is recognized to be a successor of the teacherv. (Kanji=拘束する) restrain, arrest, bind, restrict