20 Heb “act wisely,” which by metonymy means “succeed.”
21 This piling up of synonyms emphasizes the degree of the servant’s coming exaltation.
22 Some witnesses read “him,” which is more consistent with the context, where the servant is spoken about, not addressed. However, it is possible that the Lord briefly addresses the servant here. The present translation assumes the latter view and places the phrase in parentheses.
23 Heb “such was the disfigurement.” The noun מִשְׁחַת (mishkhat) occurs only here. It may be derived from the verbal root שָׁחַת (shakhat, “be ruined”; see 1007–8 שָׁחַת). The construct form appears here before a prepositional phrase (cf. §130.a).
24 Heb “from a man his appearance.” The preposition מִן (min) here carries the sense “away from,” i.e., “so as not to be.” See 583
25 Heb “and his form from the sons of men.” The preposition מִן (min) here carries the sense “away from,” i.e., “so as not to be.”
26 This statement completes the sentence begun in v. 14a. The introductory כֵּן (ken) answers to the introductory כַּאֲשֶׁר (ka’asher) of v. 14a. Verses 14b–15a are parenthetical, explaining why many were horrified.
27 Traditionally the verb יַזֶּה (yazzeh, a Hiphil stem) has been understood as a causative of נָזָה (nazah, “spurt, spatter”) and translated “sprinkle.” In this case the passage pictures the servant as a priest who “sprinkles” (or spiritually cleanses) the nations. Though the verb נָזָה does occur in the Hiphil with the meaning “sprinkle,” the usual interpretation is problematic. In all other instances where the object or person sprinkled is indicated, the verb is combined with a preposition. This is not the case in Isaiah 52:15, unless one takes the following עָלָיו (’alayv, “on him”) with the preceding line. But then one would have to emend the verb to a plural, make the nations the subject of the verb “sprinkle,” and take the servant as the object. Consequently some interpreters doubt the cultic idea of “sprinkling” is present here. Some emend the text; others propose a homonymic root meaning “spring, leap,” which in the Hiphil could mean “cause to leap, startle” and would fit the parallelism of the verse nicely.
28 Heb “Because of him kings will shut their mouths,” i.e., be speechless.

In other versions

ESVEnglish Standard Version

Behold, my servant shall act wisely;

he shall be high and lifted up,

and shall be exalted.

As many were astonished at you—

his appearance was so marred, beyond human semblance,

and his form beyond that of the children of mankind—

so shall he sprinkle many nations.

Kings shall shut their mouths because of him,

for that which has not been told them they see,

and that which they have not heard they understand.

NIVNew International Version (2011)

See, my servant will act wisely;

he will be raised and lifted up and highly exalted.

Just as there were many who were appalled at him—

his appearance was so disfigured beyond that of any human being

and his form marred beyond human likeness—

so he will sprinkle many nations,

and kings will shut their mouths because of him.

For what they were not told, they will see,

and what they have not heard, they will understand.

CSBChristian Standard Bible

See, my servant will be successful;

he will be raised and lifted up and greatly exalted.

Just as many were appalled at you—

his appearance was so disfigured

that he did not look like a man,

and his form did not resemble a human being—

so he will sprinkle many nations.

Kings will shut their mouths because of him,

for they will see what had not been told them,

and they will understand what they had not heard.

NLTNew Living Translation

See, my servant will prosper;

he will be highly exalted.

But many were amazed when they saw him.

His face was so disfigured he seemed hardly human,

and from his appearance, one would scarcely know he was a man.

And he will startle many nations.

Kings will stand speechless in his presence.

For they will see what they had not been told;

they will understand what they had not heard about.

LEBThe Lexham English Bible

Look, my servant shall achieve success;

he shall be exalted,

and he shall be lifted up,

and he shall be very high.

Just as many were appalled at you—

such was his appearance beyond human disfigurement,

and his form beyond the sons of mankind—

so he shall sprinkle many nations;

because of him, kings shall shut their mouths.

For they shall see what has not been told them,

and they shall consider with full attention what they have not heard.

KJV 1900King James Version

Behold, my servant shall deal prudently,

He shall be exalted and extolled, and be very high.

As many were astonied at thee;

His visage was so marred more than any man,

And his form more than the sons of men:

So shall he sprinkle many nations;

The kings shall shut their mouths at him:

For that which had not been told them shall they see;

And that which they had not heard shall they consider.

Public Domain