46 The Hiphil form מֵפֵר (mefer) is the participle from פָּרַר (parar, “to annul; to frustrate; to break”). It continues the doxological descriptions of God; but because of the numerous verses in this section, it may be clearer to start a new sentence with this form (rather than translating it “who …”).
47 The word is related to the verb “to think; to plan; to devise,” and so can mean “thoughts; plans; imagination.” Here it refers to the plan of the crafty that must be frustrated (see also Isa 44:25 for the contrast).
48 The word עֲרוּמִים (’arumim) means “crafty” or “shrewd.” It describes the shrewdness of some to achieve their ends (see Gen 3:1, where the serpent is more cunning than all the creatures, that is, he knows where the dangers are and will attempt to bring down the innocent). In the next verse it describes the clever plans of the wise—those who are wise in their own sight.
49 The consecutive clause showing result or purpose is simply introduced with the vav and the imperfect/jussive (see §166.a).
50 The word תּוּשִׁיָּה (tushiyyah) is a technical word from wisdom literature. It has either the idea of the faculty of foresight, or of prudence in general (see 12:6; 26:3). It can be parallel in the texts to “wisdom,” “counsel,” “help,” or “strength.” Here it refers to what has been planned ahead of time.
51 The participles continue the description of God. Here he captures or ensnares the wise in their wickedly clever plans. See also Ps 7:16, where the wicked are caught in the pit they have dug—they are only wise in their own eyes.
52 This is the only quotation from the Book of Job in the NT (although Rom 11:35 seems to reflect 41:11, and Phil 1:19 is similar to 13:6). Paul cites it in 1 Cor 3:19.
53 The etymology of נִפְתָּלִים (niftalim) suggests a meaning of “twisted” (see Prov 8:8) in the sense of tortuous. See Gen 30:8; Ps 18:26 [27].
54 The Niphal of מָהַר (mahar) means “to be hasty; to be irresponsible.” The meaning in the line may be understood in this sense: The counsel of the wily is hastened, that is, precipitated before it is ripe, i.e., frustrated (A. B. Davidson, Job, 39).

In other versions

ESVEnglish Standard Version

He frustrates the devices of the crafty,

so that their hands achieve no success.

He catches the wise in their own craftiness,

and the schemes of the wily are brought to a quick end.

NIVNew International Version (2011)

He thwarts the plans of the crafty,

so that their hands achieve no success.

He catches the wise in their craftiness,

and the schemes of the wily are swept away.

CSBChristian Standard Bible

He frustrates the schemes of the crafty

so that they achieve no success.

He traps the wise in their craftiness

so that the plans of the deceptive

are quickly brought to an end.

NLTNew Living Translation

He frustrates the plans of schemers

so the work of their hands will not succeed.

He traps the wise in their own cleverness

so their cunning schemes are thwarted.

LEBThe Lexham English Bible

He is frustrating the devices of the crafty,

and their hands do not achieve success.

He is capturing the wise in their craftiness,

and the schemes of the wily are rushed.

KJV 1900King James Version

He disappointeth the devices of the crafty,

So that their hands cannot perform their enterprise.

He taketh the wise in their own craftiness:

And the counsel of the froward is carried headlong.

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