す	じ
筋

noun

1. muscle, tendon, sinew.
2. vein, artery.
3. fiber, string.
4. line, stripe, streak.
5. 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. Messages.shogi.ninth vertical line.
14. seam on a helmet.
15. gristly fish paste (made of muscle, tendons, skin, etc.). Abbreviation.
16. social position, status. Archaism.

noun used as a suffix, noun, takes genitive case の

1. on (a river, road, etc.), along.

suffix, counter

1. counter for long thin things, counter for roads or blocks when giving directions.
2. (Edo period) counter for hundreds of mon (obsolete unit of currency). Archaism.