class-

(Latin: division according to rank; class, division, army, fleet)

classifier
classify, classfying
classism
classless
classmate
classroom
classy
declass (verb), declasses; declassed; declassing
declassification
declassified (adjective)
declassify (verb), declassifies; declassified; declassifying
To lift the restriction on something and to make it available again.
infraclass
locus classicus
A classical source.

This passage is commonly cited to explain or illustrate a subject and is also translated as, "The most authoritative or most frequently cited passage."

lowerclassman
misclassification