Quick Definition
δήπου Adv of course, indeed
Strong's Definition
from 1211 and 4225; a particle of asseveration; indeed doubtless
KJV Usage: verily
UBS Dictionary of the Greek New Testament
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
δή-που [L WH δή που; cf. Lipsius, Gram. Untersuch. p. 123 sq.], adv., (fr. δή and πού), prop. now in some way, whatever that way is; it is used when something is affirmed in a slightly ironical manner, as if with an affectation of uncertainty, perhaps, doubtless, verily : ob δήπου not surely (Germ. doch nicht etwa), hardly I trow; (ef. Rost in Passow i. p. 613"; Klotzad Devar. ii. 2 p. 427 sq.). Once in Scripture: Heb. ii. 16.* [Ala, see Zevs.]
Mounce Concise Greek Dictionary
δήπου dēpou 1x
now in some way, surely, Heb. 2:16*
Abbott-Smith Greek Lexicon
* δή-που (WH, δή που), indef. adv., mostly in sense of surely, of course, we know: He 2:16 T (WH, δή που).†
Liddell-Scott-Jones — Greek-English Lexicon
δήπου (dēpou) — surely. δήπου, indefinite adverb (better written δή που) perhaps, it may be, ᾧ δή που ἀδελφεὸν ἔκτανε [Refs 8th c.BC+]: in Trag. and Attic dialect usually doubtless, I presume, οὐ δήπου τλητόν [Refs 5th c.BC+]; ἴστε γὰρ δή που, μέμνησθε γὰρ δή που, [Refs 4th c.BC+]
II. as interrogative implying an affirmative answer, τὴν αἰχμάλωτον κάτοισθα δή πο; i.e. I presume you know, [Refs 5th c.BC+]; οὐ δή πο; surely it is not so? implying a negative answer, as [Refs 5th c.BC+]