nilpotent

"The number of students in the class multiplied after the school announced free tutoring. "

"I went to the park because the weather was nice. "

"Letters are the elements of written language."

"The store is offering a special on school supplies this week. "

"The seed of the new idea developed within the matrix of the professor's mind. "

"The door closed by itself"

"My math class is learning algebra, which uses letters like 'x' and 'y' to represent unknown quantities. "

"The fertile earth, a complex of matrices, nurtured the tiny seeds into blossoming plants. "

"The positive of finishing the project early is a bonus week of vacation. "

"This beer has no equal."

"My bank account balance is an integer; I don't have any cents. "

"The casting was mounted on a milling machine so that its sides could be squared."