# undeadly

> English word · Adjective

## Definitions
1. Not subject to death; immortal.
2. Unable to be killed, quenched, or terminated; eternal; everlasting.
3. Of or pertaining to the undead.

## Etymology
From Middle English undedly, undeedly, undedlich, from Old English undēadlīc (“immortal, for all eternity”), equivalent to undead + -ly.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/undeadly