hostage   
debaka
a pledge, a hostage, an assurance, a security. See [1.2]
fampitanana
[Rel. s. from mampitana (tana).] A pledge, security, hostage. See antoka. [1.2]
fitanana
[Rel. s. from mitana (tana).] A surety, a pledge, a hostage; a pin, a handle. See [1.2]