gaol
— Verb
– English
～ 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"
gaol
— Noun
– English
～ 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)
gaolbird
— Noun
– English
～ a criminal who has been jailed repeatedly
gaolbreak
— Noun
– English
～ an escape from jail; "the breakout was carefully planned"