pledge   
antoka
pledge [Richardson 1885, Hallanger 1973]
debaka
a pledge, a hostage, an assurance, a security. See antoka, tanana, [Richardson 1885]
fampitanana
[Rel. s. from mampitana (tana).] A pledge, security, hostage. See antoka. [Richardson 1885]
fitanana
[Rel. s. from mitana (tana).] A surety, a pledge, a hostage; a pin, a handle. See fampitanana, fihazonana, antoka, tsatoka. [Richardson 1885]
mametra-debaka
to give a pledge or a hostage (Prov.) [Richardson 1885]