Muscle: A tissue composed of fibers capable of contracting to effect bodily movement.
The word ‘Muscle’ is directly adopted into English from French ‘Muscle’ sometime in the 15th century.
Which is derived from ‘Mus’ (Latin), meaning Mouse or ‘musculus’ (Latin), meaning, little mouse....
Robot, is a fairly modern word in English language.
The origin of the word is from Old Czech words: Robotnic= forced labor; Robota=forced labor, compulsory service, or drudgery; and Robotiti= to work, or to drudge.
These are further derived from Old Slavic, Rabu= Slave, or Rabota= servitude.