Occasional
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 02:31的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/occasional ref] occasion + -al == etymonline == [https://www.etymonline.com/word/o…”的新页面）
wiktionary
occasion + -al
etymonline
occasional (adj.)
late 14c., "occurring now and then," from occasion (n.) + -al (1) or from Old French ocasionel and directly from Medieval Latin occasionalis. Meaning "casual" is 1560s. Meaning "happening on or pertaining to a particular occasion" is from 1630s. Of furniture, etc., "adapted for use on special occasions," from 1749. Middle English also had occasionary "affording opportunity, favorable" (mid-15c.).
