四字母词根: rect=right：straight正，直

correct v.n

incorrect

correction

corrective

rectangle

四字母词根: rupt=break破

rupture

interrupt

interruption

disrupt

四字母词根: sect=cut切割

insect

section

sectional

dissect

四字母词根: sent，sens=feel感觉

sentiment

sentimental

consent v.n