deceyvably

• deceivably, deceivaibely, desceyvablely, desceyvably, disceivable, disceyvabli, disceyvably
• deceyvabilly (Northern); dissayvabely (Warwickshire)

From deceyvable (“deceptive”) +‎ -ly (adverbial suffix).

• IPA^(key): /dɛːˌsæi̯ˈvaːbliː/, /dɛːˌsɛːˈvaːbliː/, /dɛ-/, /di-/, /-vaːb(l)əli/

deceyvably (chiefly Late Middle English)

1. Deceptively, deceitfully; in a deceptive way.
2. (uncommon) Only seemingly or in appearance; outwardly, feignedly.

• >? English: deceivably

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