[ほう, hou](n) (1) direction; way; side; area (in a particular direction); (2) side (of an argument, etc.); one's part; (3) type; category; (4) field (of study, etc.); (5) indicates one side of a comparison; (6) way; method; manner; means; (7) length (of each side of a square); (P)#160[Add to Longdo]
[けい, kei](n, n-suf) (1) system; lineage; group; (2) { math } corollary; (3) (geological) system (range of strata that correspond to a particular time period); (4) (taxonomical) series; (P)#222[Add to Longdo]
[かつやく, katsuyaku](n) (1) activity (esp. energetic); great efforts; conspicuous service; (vs) (2) to flourish; to participate actively; to play an active role; (P)#1297[Add to Longdo]