commonality (n.)youdaoicibaDictYouDict[commonality 词源字典]
late 14c., "a community," from common (adj.), as if from Latin *communalitas. A respelling of commonalty (late 13c.). Meaning "the common people" is attested from 1580s; that of "state or quality of being shared" is from 1954.[commonality etymology, commonality origin, 英语词源]