present
Heed, attend to
Assister means 'to attend' (a class, a conference, ..), or 'to help' (to be of assistance, which has the same roots).
A word that has the same meaning as another word is a synonym.
absent
Another word meaning clenched is tighten.
The meaning of a word is its "definition."
Class is the English meaning for the Kikuyu word kirathi.
cherish, accomplish, and attend
"It was doubtless they would have to attend the class."
Class's is a possessive word, meaning "belonging to the class." The class's grades are posted. The class's teacher was absent today.
Another word is I didn't do it! OR She/He did it.
another word for eclectic