imprison

Synonyms: apprehend bastille bottle up cage check circumscribe closet commit constrain curb detain fence in hold hold captive hold hostage hold in custody ice immure impound incarcerate intern jail keep keep captive keep in custody limit lock in lock up nab occlude pen put away put behind bars rail in remand restrain send to prison send up shut in stockade take prisoner trammel

Antonyms: free let go release