i Register
In some senses, captive is marked as figuratively, archaic. Watch for register when choosing this word.
VERBS
be
take sb
The soldiers took several prisoners captive during the military operation.
hold sb, keep sb
The rebels kept the hostages captive for three weeks before releasing them.
VERB + CAPTIVE
free, release
After the war ended, the government freed all the captives held in the prison camps.