Professional
来自Big Physics
Safin（讨论 | 贡献）2022年4月26日 (二) 23:13的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/professional ref] profession + -al == etymonline == [https://www.etymonline.com/wo…”的新页面）
wiktionary
profession + -al
etymonline
professional (adj.)
mid-15c., profeshinalle, in reference to the profession of religious orders; see profession. By 1747 of careers, "pertaining to or appropriate to a profession or calling" (especially of the skilled or learned trades from c. 1793); In sports and amusements, "undertaken or engaged in for money" (opposed to amateur), by 1846. Related: Professionally.
professional (n.)
"a professional person, one who follows a trade or occupation in a professional way," 1798, from professional (adj.).
