muralyoudaoicibaDictYouDict[mural 词源字典]
mural: [16] The Latin for ‘wall’ was mūrus, derivatives of which have given English immure [16] and mural. It came from an earlier form moerus, to which was related moenia ‘walls’, source of the verb mūnīre ‘fortify, defend’. This has given English muniment ‘documentary proof of ownership, which ‘defends’ one’s right to something’ [15] and munition [16] (whence ammunition).
=> ammunition, immure, muniment, munition[mural etymology, mural origin, 英语词源]
mural (n.)youdaoicibaDictYouDict
painting on a wall, 1921, short for mural painting (1850), from mural (adj.) "pertaining to walls" (mid-15c.), from Latin muralis "of a wall," from murus "wall" (Old Latin moiros, moerus), from PIE *mei- "to fix; to build fences or fortifications" (cognates: Old English mære "boundary, border, landmark;" Old Norse -mæri "boundary, border-land;" Latin munire "to fortify, protect").