mortal

Etymology

From Middle English mortal, mortel, from Old French mortal, and their source Latin mortālis, from mors (“death”). Partly displaced native deadly, from Old English dēadlīċ.

adj

1. Susceptible to death by aging, sickness, injury, or wound; not immortal.
2. Causing death; deadly, fatal, killing, lethal (now only of wounds, injuries etc.).
3. Punishable by death.
4. Fatally vulnerable.
5. Of or relating to the time of death.
6. Affecting as if with power to kill; deathly.
   mortal enemy
   Although the Japanese have engaged with little hesitation, they are as surprised as the Americans to be fighting this battle. Although the escort-carrier groups have been under sporadic air attack for over a week, these attacks appear to have been conducted by aircraft from the Japanese Army, who, of course, have utterly failed to mention any of this to their counterparts-dash-rivals-dash-mortal enemies in the Imperial Japanese Navy. 27 February 2019, Drachinifel, 13:20 from the start, in The Battle of Samar - Odds? What are those?, archived from the original on 2022-11-03
7. Human; belonging or pertaining to people who are mortal.
   mortal wit or knowledge; mortal power
   “It's just...I hesitated to call the police. I wasn't sure you'd appreciate their presence.” He sure wouldn't. Mortal scum he could dispatch. Mortal law enforcement he avoided at all costs[…] 2012, Olivia Gates, Immortal, Insatiable, Indomitable, Harlequin
8. Very painful or tedious; wearisome.
   a sermon lasting two mortal hours
   a. 1832, Walter Scott, To Halbert
9. (Scotland, Tyneside, slang) Very drunk.
   Thats nothing, says Tequila Sheila, who told how the summer she was housemaid in The Saint Columba she took this guy back to the staff flats while mortal on slammers and crashed out on him before anything could happen. 1995, Alan Warner, Morvern Callar, Vintage, published 2015, page 13
10. (religion, of a sin) Causing spiritual death.

noun

1. A human; someone susceptible to death.
   Her wisdom was beyond that of a mere mortal.

adv

1. (colloquial) Mortally; enough to cause death.
   It's mortal cold out there.