ADJ

big, deep, huge, large, long, serious
short, small
fine, hairline, thin

CRACK + VERB

appear
develop, spread
run
A fine crack ran up the wall

ADJ

narrow, small, tiny
wide

VERB + CRACK

fill
We filled the cracks in the plaster before hanging the wallpaper

CRACK + VERB

appear
Wide cracks appeared in the ground during the drought
open up, widen

PREP

~ in
There's a crack in the fence big enough to look through

PHRASES

a crack of light
a tiny crack of light under the door
open a door/ window a crack
Could you open the window just a crack?

ADJ

loud, sharp

VERB + CRACK

give, let out
He gave a crack of laughter
hear

PREP

with a ~
The chandelier hit the floor with a crack
~ of

PHRASES

the crack of a whip, a crack of thunder

ADV

badly
The dish had cracked quite badly
slightly

ADV

completely
finally
The stresses of her job became too great and she finally cracked
up
He thought he'd never get through the ordeal without cracking up
hard

PHRASES

crack under the pressure/strain, show signs of cracking
He is under a lot of pressure but is showing no signs of cracking
PHRASAL VERBS crack down

PREP

on
to crack down hard on crime