D2I1A1G2O1N1A1L1I1S1I1N1G2
16 points
DIAGONALISING is no goodvalid
Not a playable Scrabble word in NWL2023.
DIAGONALISE, to put (a matrix) in a form with all the nonzero elements along the diagonal from upper left to lower right, also DIAGONALIZE [v]