Adjective
unkillable (not comparable)
Not killable; unable to be killed.
Society has already told us that poetry is dead. Let's build a funeral pyre out of the desiccated conventions piled around us and watch the ancient, spangle-feathered, unkillable phoenix rise from the ashes. Dana Gioia
Frank language about possible collusion was about as likely as real-life evidence of the apparently unkillable liberal slash fiction in which Trump and Vladimir Putin are lovers who ride flying unicorns together. Source: Internet
But Deadpool’s mutant power makes him essentially unkillable: In the first film, he shatters his hands punching the X-Man Colossus (Stefan Kapicic) and grows new ones by the next fight. Source: Internet