獄屋 is read as ごくや (gokuya) and means prison.
ごくや
gokuya
ごくちゅう
during imprisonment
ごくちゅうにっき
prison diary
ごくちゅうき
ごくもんだい
platform on which the decapitated head of a criminal was displayed
ごくそ
prison
ごくし
death in jail
こうや
dyer
しばいごや
playhouse
なや
shed
ふろや
bathhouse proprietor
はいおく
dilapidated house
かぶや
stockbroker