poisonable
/ˈpɔɪz(ə)nəbl/ /ˈpɔɪz(ə)nəbl/adjective
1Having the property of poisoning; poisonous. Also figurative. Chiefly Scottish in early use.
2Able to be poisoned; susceptible to poison.
Origin
Early 16th century; earliest use found in Robert Henryson (d. c1490), poet. From poison + -able.