catalectic (adj.)youdaoicibaDictYouDict[catalectic 词源字典]
1580s, in a line of verse, "wanting an unaccented syllable in the last foot," from Late Latin catalecticus, from Greek katalektikos "leaving off," from kata- "down" (see cata-) + legein "to leave off, cease from," from PIE *(s)leg- "to be slack, be languid" (see lax). A complete line is said to be acatalectic.[catalectic etymology, catalectic origin, 英语词源]