Incidental
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 23:30的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=incidental+etymology&newwindow=1&hl=en ref] early 17th century: originally from medieval…”的新页面）
early 17th century: originally from medieval Latin incidentalis, from Latin incident- ‘falling upon, happening to’ (from the verb incidere ).
wiktionary
From incident + -al.
etymonline
incidental (adj.)
"casual, occurring casually in connection with something else; of minor importance," 1640s, from Medieval Latin incidentalis, from incidens (see incident (n.)). The earlier adjective in this sense was incident (1520s). Incidentals (n.) "'occasional' expenses, etc.," is attested by 1707. Incidental music "background music," originally in operas, is from 1812.
