词根词缀：angle, angu-

【来源及含义】Latin: a corner, a bend

【同源单词】acutangular, acute angle, angle, angle, angular, angularly

词根词缀：septi-, sept-, septem-

【来源及含义】Latin: seven, seventh; a word element for number 7

【同源单词】septangle, septangular, septarch, septarchy, septave, September