筋膜 is read as きんまく (kimmaku) and means fascia.
きんまく
kimmaku
えしせいきんまくえん
necrotizing fasciitis
そくていきんまくえん
plantar fasciitis
こまくちょうきん
tensor tympani muscle
すじ
(Edo period) counter for hundreds of mon (obsolete unit of currency)
きんにく
muscle
すじみち
reason
すじちがい
illogical
きんりょく
physical strength
すじがき
synopsis
すじがね
a metal reinforcement
すじあい
きんにくしつ
lean (of a company's operations, etc.)