The Collaborative International Dictionary
Vengeable
Vengeable \Venge"a*ble\, a.
Revengeful; deserving revenge. [Obs.]
--Spenser. --
Venge"a*bly, adv. [Obs.]
Wiktionary
vengeable
a. 1 (context obsolete English) vengeful. 2 (context obsolete English) Prompted by or characterised by revenge; severe, cruel.