It's 'onward' instead of 'onwards' in the American edition. Pick what you think to be best.
to slap someone on their back
manky old boot
to fall off one’s broom
to zoom out of one’s pocket
to pant ‘Whew!’
to wipe one’s glasses on one’s sweater
scrubby brown beard
to feel around for one’s glasses
to glower at somebody
to hold up a worn pair of jeans
it’s a minute off
to pull something onwards
ruddy-faced wizard
to squint around at the ground
passageway
to set up precautions
Ron staggered into Harry and he fell over