The Collaborative International Dictionary
Undeadly
Undeadly \Un*dead"ly\, a.
Not subject to death; immortal. [Obs.] -- Un*dead"li*ness,
n. [Obs.]
--Wyclif.
Wiktionary
undeadly
Etymology 1 a. 1 Not subject to death; immortal. 2 Unable to be killed, quenched, or terminated; eternal; everlasting. 3 Of or pertaining to the undead. adv. immortally; eternally. Etymology 2
a. Not deadly; not causing, producing, or resulting in death; harmless.