bail: P. and V. ἐγγύη, ἡ.
a person acting as surety: Ar. and P. ἐγγυητής, ὁ.
pledge: P. and V. πίστις, ἡ, πιστόν, τό, or pl., V. πιστώματα, τά.
give surety offer bail, v.: Ar. and P. ἐγγυᾶσθαι, P. κατεγγυᾶσθαι.