gaol

Noun

• a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)

Verb

• lock up or confine, in or as in a jail
  • The suspects were imprisoned without trial
    
  • the murderer was incarcerated for the rest of his life
    

Related words

• Synonyms: 
  jail , jailhouse , clink , slammer , poky , pokey