The lover thinks more often of reaching his mistress than the husband of guarding his wife; the prisoner thinks more often of escaping than the gaoler of shutting his door; and so, whatever the obstacles may be, the lover and the prisoner ought to succeed. [Stendhal, "Charterhouse of Parma"]
Obstacle course is attested from 1891.词根词缀: ob-相反;对面 + -st-站立,放置 + -acle名词词尾
该词的英语词源请访问趣词词源英文版:obstacle 词源,obstacle 含义。
ob-,相对,对着的,-st,站,站立,词源同stand.即对着站的,站在对面的,引申词义障碍。