Illegitimate
来自Big Physics
mid 16th century: from late Latin illegitimus (from in- ‘not’ + legitimus ‘lawful’), suggested by legitimate.
wiktionary
Based on Latin illegitimus; equivalent to il- + legitimate.
etymonline
illegitimate (adj.)
1530s, "born out of wedlock," formed in English (and replacing earlier illegitime, c. 1500), modeled on Late Latin illegitimus "not legitimate" (see il- + legitimate). Sense of "unauthorized, unwarranted" is from 1640s. Phrase illegitimi non carborundum, usually "translated" as "don't let the bastards grind you down," is fake Latin (by 1965, said to date from c. 1939). Carborundum was a brand of abrasives. Related: Illegitimately.
