'Deadly' in the Bible

they will pick up serpents, and if they drink anything deadly, it will not hurt them; they will lay hands on the sick, and they will get well.”

There will be violent earthquakes, and in various places famines and [deadly and devastating] pestilences (plagues, epidemics); and there will be terrible sights and great signs from heaven.

For [godly] sorrow that is in accord with the will of God produces a repentance without regret, leading to salvation; but worldly sorrow [the hopeless sorrow of those who do not believe] produces death.

But no one can tame the human tongue; it is a restless evil [undisciplined, unstable], full of deadly poison.

I saw one of his heads which seemed to have a fatal wound, but his fatal wound was healed; and the entire earth followed after the beast in amazement.

He exercises all the authority of the first beast in his presence [when the two are together]. And he makes the earth and those who inhabit it worship the first beast, whose deadly wound was healed.