absorb
bang
bar
barricade
batten
batten down
block
block up
blockade
bolt
button
button up
chock
choke
choke off
clap
clog
close
close off
close tight
close up
closed
congest
constrict
contain
contract
cover
crowd
debar
dog
fasten
fold
fold up
jam
key
latch
lock
lock out
lock up
obstruct
pack
padlock
plug
plumb
seal
seal off
seal up
secure
hinder
impede
asphyxiate
back up
barricado
block off
block out
clog up
dam
dam up
earth up
foul
land up
screen
stifle
stop
suffocate
tie up
occluded
occludes
occluding