to intercede: to step in and plead with God on someone else's behalf
This word appears only once in the whole Bible, in Romans 8:26, where Paul says the Spirit intercedes for us. Paul seems to have coined it. There is no trace of it in any Greek writer before him, and after him it turns up almost only in Christian authors who are echoing this verse. He needed a word for something no existing Greek word quite named: the Spirit's own pleading with God on our behalf.
The word is built from an ordinary verb that meant to approach someone in authority and put in a formal request, the kind of language used for petitioning a king or a governor. To the front of it Paul adds a prefix that means "on behalf of," so the idea of pleading for another is folded right into the word itself. In the very next verse he drops back to the plain verb and spells out "on behalf of the saints," which shows that the fuller word here is already carrying that same sense.
In Romans 8 the Spirit intercedes "with wordless groans," and scholars have long argued over what those groans are: silent longings, inarticulate sighs, or even ecstatic prayer. That debate is about the groans, not about this word. What the word itself contributes is clear: when believers do not know how to pray, the Spirit takes up their need and pleads for them before God. The picture matches verse 34, where Christ intercedes for us in heaven; here the same work is done by the Spirit from within the human heart.
Disputed
Whether the ὑπερ- prefix on this compound carries its substitutionary "on behalf of" sense or an intensifying "beyond measure" force in Romans 8:26.
- majorityThe prefix absorbs an implied ὑπέρ τινος, so the word means plainly "intercede for," matching the explicit ὑπὲρ ἁγίων of v. 27 and ὑπὲρ ἡμῶν of v. 34; the ancient scribes who added ὑπὲρ ἡμῶν after the verb read it this way.; BDAG, s.v. ὑπερεντυγχάνω; LSJ, s.v. ὑπερεντυγχάνω; O. Bauernfeind, "τυγχάνω, ἐντυγχάνω, ὑπερεντυγχάνω," TDNT 8:238-245; C. E. B. Cranfield, Romans, ICC (1975), 1:423-424; Joseph A. Fitzmyer, Romans, AB 33 (1993), 517-520
- minorityBoth nuances operate at once, with the substitutionary sense primary and an intensive shading added by Paul's rhetoric.; Douglas J. Moo, The Epistle to the Romans, NICNT (2nd ed., 2018), 522-528; Robert Jewett, Romans, Hermeneia (2007), 517-523
- minorityThe prefix chiefly intensifies, in line with Paul's fondness for ὑπερ- compounds in this letter (cf. ὑπερνικάω in Rom 8:37); the Spirit intercedes surpassingly or abundantly.; James D. G. Dunn, Romans 1-8, WBC 38A (1988), 476-482