missing (adj.)youdaoicibaDictYouDict[missing 词源字典]
"not present, absent," 1520s, from present participle of miss (v.). Military sense of "not present after a battle but not known to have been killed or captured" is from 1845. Missing link first attested 1851 in Lyell. Missing person is from 1876.[missing etymology, missing origin, 英语词源]