WordNet sense 1 (leather that has had its grain pattern accentuated):

crushed leather

WordNet sense 2 (a dense crowd of people):

jam, press

WordNet sense 3 (temporary love of an adolescent):

infatuation, puppy love, calf love

WordNet sense 4 (come down on or keep down by unjust use of one's authority):

oppress, suppress

WordNet sense 5 (humiliate or depress completely):

demolish, smash

WordNet sense 6 (to compress with violence, out of natural shape or condition):

mash, squash, squeeze, squelch

WordNet sense 7 (make ineffective):

break down

WordNet sense 8 (come out better in a competition, race, or conflict):

beat, shell, trounce, vanquish, beat out

WordNet sense 9 (the act of crushing):

crunch, compaction