door
She felt a blast of cold air as she opened the door.
She looked at Gary in amusement as he struggled to open the door.
I've told Daisy that she is not to open the door to any strangers.

SMART Vocabulary: related words and phrases

Unfastening and opening
break something open
breaker
decongestion
gape
let/set something looseidiom
loose
steam
tease
tease something out
the earth/ground/floor opensidiom
unbolted
unbuckle
unbutton
unfold
unlace
unlock
unlockable
unpick
unplug
unzip