筋 - muscle, sinew, tendon

path; route; itinerary

cramp; sprain; crick; strain (muscle)

one line; one stretch (e.g. of road); one strand (e.g. of hair); one beam (e.g. of light); one ray; one length (e.g. of rope)

physical strength; muscle strength

popular line (of products); best-selling line; hot sellers

muscle

list of top-selling products

outline; summary; gist; basic points

informed circles

spine; line of the backbone

reason; logic

rebar; (iron) reinforcing bar; reinforcing steel