stop (someone or something) from doing something or being in a certain state
keep from happening or arising; make impossible
give a promotion to or assign to a higher position
make publicity for; try to sell (a product)
contribute to the progress or growth of
be changed for a superior chess or checker piece
change a pawn for a better piece by advancing it to the eighth row, or change a checker piece for a more valuable piece by moving it to the row closest to your opponent
