Utility
来自Big Physics
late Middle English: from Old French utilite, from Latin utilitas, from utilis ‘useful’.
wiktionary
From Middle English utilite, from Old French utilite, utilitet(“usefulness”), from Latin ūtilitās, from uti(“to use”). Surface etymology utile + -ity.
etymonline
utility (n.)
late 14c., "fact of being useful," from Old French utilite "usefulness" (13c., Modern French + utilité), earlier utilitet (12c.), from Latin utilitatem (nominative utilitas) "usefulness, serviceableness, profit," from utilis "usable," from uti "make use of, profit by, take advantage of" (see use (v.)). Meaning "a useful thing" is from late 15c. As a shortened form of public utility it is recorded from 1930.
