abstract
abstract background
arrest
barred
barrier
bars
behind
cage
captive
captivity
confined
convict
convicted
crime
criminal
depressed
depression
detention
entrapment
expression
freedom
hand
imprisoned
imprisonment
isolation
lock
male
metal
oppressed
oppression
prison
prisoner
punishment
repress
repression
restrain
restrained
restricted
restrictions
rights
sad
saddness
solitude
steel
suppress
suppressed
trapped
victim
wild animals
worried