revengeable
/rɪˈvɛn(d)ʒəbl/adjective
1Characterized by a desire for revenge; vengeful, vindictive; avenging.
2Worthy or capable of being revenged. rare after 17th cent.
Origin
Early 16th century; earliest use found in Gavin Douglas (c1476–1522), poet and bishop of Dunkeld. Either from revenge + -able, or from re- + vengeable adverb, after revenge.