hostage
Concise Oxford English Dictionary © 2008 Oxford University Press:
hostage/ˈhɒstɪʤ/
▶noun a person seized or held as security for the fulfilment of a condition.
– phrases
a hostage to fortune an act or remark seen as unwise because it invites trouble.
a hostage to fortune an act or remark seen as unwise because it invites trouble.
– origin ME: from OFr., based on late L. obsidatus ‘the state of being a hostage’, from L. obses, obsid- ‘hostage’.
'hostage' also found in these Oxford entries:

