WordofTheDay.US

adventitious

/ˌæd.vənˈtɪʃ.əs/ adjective

Latin root: adventītius Wiktionary

Origin

From Medieval Latin adventītius (“coming from abroad, extraneous”), a corruption of Latin adventīcius (“foreign, strange, accidental”), from adventus (“arrival, coming, approach, advent”) + -īcius (suffix forming adjectives), from adveniō (“to arrive”) + -tus (suffix forming action nouns).

From Wiktionary, via Kaikki.org (CC BY-SA)