• 牢ろう

  prison, jail, gaol

• 牢屋ろうや

  jail, gaol, jailhouse

• 牢死ろうし

  dying in prison

• 牢獄ろうごく

  prison, jail, gaol

• 牢番ろうばん

  prison guard, jailer, gaoler

• 牢固ろうこ

  firm, solid, inflexible, immovable

• 牢記ろうき

  keeping in mind, taking note of, remembering, taking to heart

• 牢問ろうもん

  whipping, stone placement, and shrimp-tie bondage (three forms of Edo-period torture)

• 女牢おんなろう

  jail for women (Edo period)

• 入牢にゅうろう

  imprisonment

• 蒲牢ほろう

  Pulao (Chinese dragon)

• 土牢つちろう

  dungeon, underground prison

• 水牢みずろう

  (punishment by being placed in a) water-filled chamber

• 永牢えいろう

  life imprisonment

• 堅牢けんろう

  solid, strong, sturdy, durable, stout

• 地牢じろう

  dungeon, underground prison

• 牢役人ろうやくにん

  (Edo-period) jail warden, jailer

• 牢屋敷ろうやしき

  precinct of a jail, vicinity of a prison

• 牢名主ろうなぬし

  head of a prisoners' group (Edo period)

• 牢破りろうやぶり

  jailbreak, breaking out of prison

• 座敷牢ざしきろう

  room for confining criminals or lunatics (Edo period)

• 地下牢ちかろう

  dungeon

• 牢としてろうとして

  firmly, strongly

• 亡羊補牢ぼうようほろう

  locking the barn door after the horse has bolted, doing something too late, mending the pen after the sheep are lost

• 堅牢堅固けんろうけんご

  firm and solid, stout and durable

• 石牢いしろう

  jail made by placing bars across a cave entrance, cave prison

• 破牢はろう

  breaking out of prison, jailbreak

• 岩牢いわろう

  cave prison, cliffside jail