Isa 53: 4

(KJV)

Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.
(NASB2020)
However, it was our sicknesses that He Himself abore,
And our pains that He carried;
Yet we ourselves assumed that He had been afflicted,
Struck down by bGod, and humiliated.

(NET2full)
But he lifted up our illnesses,
he carried our pain;
sn Illness and pain stand by metonymy (or perhaps as metaphors) for sin and its effects, as vv. 11-12 make clear.

even though we thought he was being punished,
attacked by God, and afflicted for something he had done.
tn The words “for something he had done” are supplied in the translation for clarification. The group now realizes he suffered because of his identification with them, not simply because he was a special target of divine anger.

Isa 53: 5

(KJV)
But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
 wounded: or, tormented
,
 stripes: Heb. bruise
(NASB2020)
But He was
Or wounded
pierced for hour offenses,
He was crushed for iour wrongdoings;
The jpunishment for our
Or peace
well-being was laid upon Him,
And by lHis wounds we are healed.
(NET2full)
He was wounded because of
tn The preposition מִן (min) has a causal sense (translated “because of”) here and in the following clause.
our rebellious deeds,
crushed because of our sins;
he endured punishment that made us well;
tn Heb “the punishment of our peace [was] on him.” שָׁלוֹם (shalom, “peace”) is here a genitive of result, i.e., “punishment that resulted in our peace.”

because of his wounds we have been healed.
sn Continuing to utilize the imagery of physical illness, the group acknowledges that the servant’s willingness to carry their illnesses (v. 4) resulted in their being healed. Healing is a metaphor for forgiveness here.
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