confiner

One who, or that which, limits or restrains.

[…] as he attended him through the streets, the common people, and even women, uttered loud exclamations of abuse against him, calling him the murderer of syeds, and confiner of Chaund Sultana.

[…] I hope to gain a friend in you, and that will surely repay, a thousand times, the exertions I have at length happily made to terminate your captivity, which has, I know, been continued, rather from the obstinacy and idleness of your confiners, than any remaining malice against your country, or suspicions of yourself.

A person who lives on the confines, boundary or edge; a neighbour.

1599, Samuel Daniel, The Civil Wars of England, Book 1, Stanza 18, in Poeticall Essayes, London: Simon Waterson, p. 4, So did the worldes proud Mistres Rome at first Striue with a hard beginning, warr’d with need; Forcing her strong Confiners to the worst, And in her bloud her greatnes first did breed:

[…] though Gladnesse, and Griefe, be opposites in Nature; yet they are such Neighbours and Confiners in Arte, that the least touch of a Pensill, will translate a Crying, into a Laughing Face […]

A person who lives within the confines; an inhabitant.

The senate hath stirr’d up the confiners And gentlemen of Italy, most willing spirits, That promise noble service […]

A prisoner incarcerated for a set term.

1819, Joseph John Gurney, Notes on a Visit Made to Some of the Prisons in Scotland and the North of England in Company with Elizabeth Fry, London: Longman, Hurst, Rees, Orme & Brown, p. 64, Lancaster Castle […] contains two classes of prisoners; first, the untried, and those sentenced to death or transportation; and secondly, confiners,—persons sent hither for terms of imprisonment and labour.