A History of Short Words

From the New York Times Crossword Puzzle

SUM

Sun, 4 Sep '22
"I am," in Latin
Sat, 7 May '22
Total
Thu, 28 Apr '22
Adding purpose?
Wed, 9 Feb '22
45, for each row and column in a sudoku grid
Fri, 4 Feb '22
?, in math
Mon, 15 Nov '21
"Cogito ergo ___"