anapaestyoudaoicibaDictYouDict[anapaest 词源字典]
"A metrical foot consisting of two short or unstressed syllables followed by one long or stressed syllable", Late 16th century: via Latin from Greek anapaistos 'reversed', from ana- 'back' + paiein 'strike' (because it is the reverse of a dactyl).[anapaest etymology, anapaest origin, 英语词源]