simile (n.)youdaoicibaDictYouDict[simile 词源字典]
late 14c., from Latin simile "a like thing; a comparison, likeness, parallel," neuter of similis "like" (see similar). Both things must be mentioned and the comparison directly stated. To Johnson, "A simile, to be perfect, must both illustrate and ennoble the subject."[simile etymology, simile origin, 英语词源]