angular (adj.)youdaoicibaDictYouDict[angular 词源字典]
1590s, from Latin angularis "having corners or angles," from angulus (see angle (n.)). Earlier in an astrological sense, "occupying a cardinal point of the zodiac" (late 14c.). Angulous "having many corners" is from mid-15c.[angular etymology, angular origin, 英语词源]