(すじ) (n) (1) muscle; tendon; sinew; (2) vein; artery; (3) fiber; fibre; string; (4) line; stripe; streak; (5) (See 筋が通る) reason; logic; (6) plot; storyline; (7) lineage; descent; (8) school (e.g. of scholarship or arts); (9) aptitude; talent; (10) source (of information, etc.); circle; channel; (11) well-informed person (in a transaction); (12) logical move (in go, shogi, etc.); (13) ninth vertical line (shogi); (14) seam on a helmet; (15) (abbr) (See 筋蒲鉾) gristly fish paste (made of muscle, tendons, skin, etc.); (16) (arch) social position; status; (n-suf,n,adj-no) (17) on (a river, road, etc.); along; (suf,ctr) (18) counter for long thin things; (19) (arch) (Edo period) counter for hundreds of mon (obsolete unit of currency); (P) [EDICT]
(いん) (n) (1) cause; factor; (2) {Buddh} (See 縁・えん・5) hetu (direct cause, esp. as opposed to indirect conditions); (3) (See 因明) the basis of one's argument (in hetuvidya); (P) [EDICT]