desperate (adj.)youdaoicibaDictYouDict[desperate 词源字典]
early 15c., "despairing, hopeless," from Latin desperatus "given up, despaired of," past participle of desperare (see despair (v.)). Sense of "driven to recklessness" is from late 15c.; weakened sense of "having a great desire for" is from 1950s. Related: Desperately.[desperate etymology, desperate origin, 英语词源]
eagle (n.)youdaoicibaDictYouDict
mid-14c., from Old French egle, from Old Provençal aigla, from Latin aquila "black eagle," fem. of aquilus, often explained as "dark colored" (bird); see aquiline. The native term was erne. Golf score sense is by 1908 (according to old golf sources, because it "soars higher" than a birdie). As the name of a U.S. $10 coin minted from 1792 to 1933, established in the 1786 resolution for a new monetary system (but at first only the desperately needed small copper coins were minted). The figurative eagle-eyed is attested from c. 1600.