deceyvable

• deceivable, deceyveabul, desceyvable, desseyvable, disceyvable, diseyvable
• deceyveable, deseveable, deseivable, desseyvabill, desseyvabule, disceivable, dissavable, dyssevable, dysseyvable (Late Middle English)
• desaifabile, desaveabyll, desayvabel, desayvabil, dessayvable (Northern, Northeast Midland); dissavabylle, dyssaveabyll (Catholicon Anglicum)
• deceyvabyl, dysseyvabyl (Norfolk); deceywabyl (Promptorium Parvulorum)

Borrowed from Anglo-Norman decevable then rebuilt as deceyven (“to deceive”) +‎ -able (“-able”).

• IPA^(key): /dɛːˌsæi̯ˈvaːbəl/, /dɛːˌsɛːˈvaːbəl/, /dɛ-/, /di-/, /-vaːblə/

deceyvable

1. Deceptive, misleading; giving a false impression.
   1. Deceitful, untrustworthy; giving lies.
   2. Fraudulent, misrepresented; lied about.
   3. Misleading, confusing; promoting misconceptions.
2. (medicine) Risky; of uncertain benefit or result.

• English: deceivable
• Middle Scots: dissavabill, dissavable

• “dēceivāble, adj.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.