muscle    inyāma y'umubiri, umurya, umusoso, umutsi
(to be sore in) kunywāguka
En-En dictionary 
inyāma (i-)     3  class 3
singular: i-,in-
plural: i-,in-
  
1. meat, 2. flesh, 3. muscle
kunywāguka (-nywāgutse)     v    to fall and hurt oneself, to be sore in one's muscles
umusoso (imi-)     2  class 2
singular: umu-
plural: imi-
  
muscle
umutsi (imi-)     2  class 2
singular: umu-
plural: imi-
  
1. blood vessel, 2. nerve, 3. muscle, 4. tendon
sore    igikomere
(little) akarōnda
(to be) gutonekara
(in one's muscles) kunywāguka
(to hit a ~ place) gutoneka
(to have running sores) kujējēta
En-En dictionary 
strain    (muscle) gukāshuka, guhānyuka
(water) kumimina
En-En dictionary