decathlon (n.)youdaoicibaDictYouDict
1912, from deca "ten" (see ten) + Greek athlon "contest, prize," which is of uncertain origin. A modern Olympic event consisting of 10 challenges.
enterprise (n.)youdaoicibaDictYouDict
early 15c., "an undertaking," formerly also enterprize, from Old French enterprise "an undertaking," noun use of fem. past participle of entreprendre "undertake, take in hand" (12c.), from entre- "between" (see entre-) + prendre "to take," contraction of prehendere (see prehensile). Abstract sense of "adventurous disposition, readiness to undertake challenges, spirit of daring" is from late 15c.