Real Bible Translation

And on the spot an angel of a master knocked himself anti to which things he did not give the Glory to the God, and he who was born a worm-eaten one, cooled down.⁵⁷

Julia Smith Literal 1876 Translation:
And immediately the messenger of the Lord struck him, because he gave not the glory to God: and eaten by worms, he expired.

LITV Translation:
And instantly an angel of the Lord struck him, because he did not give the glory to God. And having been eaten by worms, his soul went out.

Footnotes

Act 12:23

ἐκψύχω — literally “to lose heat” (ἐκ + ψύχω), hence “to cool down” in physiological or physical contexts (e.g. Arist. Pr. 882a36). By semantic extension it denotes loss of vital warmth, and therefore “to faint,” “to collapse,” and ultimately “to expire, die”. The underlying concept is the departure of θερμότης (heat) as the principle of life. But at its core, ἐκψύχω = “to cool down, lose heat.” Since vital heat (θερμότης) was understood as the principle of life, its loss naturally signified death.

Aristotle, Problems 882a36

πνεῦμα πολὺ ... ἐκκαίεται, ὃ οὐχ ἅμα ἐκψύχεται στάντι
“Breath is greatly heated, and it does not cool down at once when standing still.”

Plutarch 2.695d

τὸ ἐκψύχεσθαι οὐ πήγνυσιν μόνον ἀλλὰ καὶ τήκει τὰ σώματα
“Cooling down not only solidifies but also melts bodies.”

This is physical thermal contraction and phase change.

the cooling not only freezes but also melts the bodies
“Cooling down not only solidifies but also melts bodies.”