accidental
/aɡθidenˈtal/ · B2 · adj
accidental
💥 accidental = English accident + -al, same Latin root: ad + cadere (to fall upon)
Spanish accidental is a near twin of English accidental. Both come from Latin accidens, from ad (toward) + cadere (to fall): something that just falls out, unplanned. That also explains the sense of nonessential: a side feature, not the core.