Held captive or imprisoned; taken prisoner; held in a state of captivity.
From captive (held as a prisoner) plus the past participle suffix -ed, which can function as an adjective meaning 'having been subjected to' or 'put in a state of.'
Captived is an archaic or poetic word that's almost disappeared from English, replaced by simpler terms, but it survives in old literature as a shorthand for the psychological state of being imprisoned.
Complete word intelligence in one call. Free tier — 50 lookups/day.