against
How can I use against in a sentence?
The dark shapes of desks and chairs were piled against the walls, and there was an upturned wastepaper basket – but propped against the wall facing him was something that did not look as if it belonged there, something that looked as if someone had just put it there to keep it out of the way.
He mounted the broom and kicked hard against the ground and up, up he soared; air rushed through his hair, and his robes whipped out behind him — and in a rush of fierce joy he realized he would found something he could do without being taught — this was easy, this was wonderful.
It was a very dark, cloudy night, and they were a bit late arriving at Hagrid's hut because they'd had to wait for Peeves to get out of their way in the entrance hall, where he would been playing tennis against the wall.
Ron dived, Hermione rocketed upward, the key dodged them both, and Harry streaked after it; it sped toward the wall, Harry leaned forward and with a nasty, crunching noise, pinned it against the stone with one hand.
The next morning in Defense Against the Dark Arts, while copying down different ways of treating werewolf bites, Harry and Ron were still discussing what they'd do with a Sorcerer's Stone if they had one.