Job 33:25 New English Translation

²⁵then his flesh is restored^[a] like a youth’s;
he returns to the days of his youthful vigor.^[b]

Job 33:25 tc The word רֻטֲפַשׁ (rutafash) is found nowhere else. One suggestion is that it should be יִרְטַב (yirtav, “to become fresh”), connected to רָטַב (ratav, “to be well watered [or moist]”). It is also possible that it was a combination of רָטַב (ratav, “to be well watered”) and טָפַשׁ (tafash, “to grow fat”). But these are all guesses in the commentaries.
Job 33:25 tn The word describes the period when the man is healthy and vigorous, ripe for what life brings his way.

New English Translation (NET)