Lexical Definition

‎δαπανάω‎ dapanáō (dap-an-ah'-o) to spend ^G:V
from ‎δαπάνη‎

be at charges, consume, spend.

• to expend, i.e. (in a good sense) to incur cost, or (in a bad one) to waste

Abbott-Smith

** δαπανάω, -ῶ [in LXX: To 1:7, I Mac 14:32, al. ;]
1. to spend, expend: c. acc., Mk 5:26; seq. ἐπί, c. dat. pers., Ac 21:24; ὑπέρ, II Co 12:15.
2. to consume, squander: Lk 15:14; ἐν τ. ἡδσναῖς (on the constr. with ἐν, v. Hort, Mayor, in l.), Ja 4:3 (cf. ἐκ-, προσ- δ.).†

Abbott-Smith References

Liddell-Scott-Jones

δαπανάω-άω:—

passive, present participle δαπανούμενα (as if from δαπανέω) [Refs 1st c.BC+]: future δαπανηθήσομαι [Refs 1st c.BC+]: aorist ἐδαπανήθην [Refs 5th c.BC+]: perfect δεδαπάνημαι [Refs 5th c.BC+]pluperfect δεδαπάνητο (κατα-) [Refs 5th c.BC+]:—passive, also middle δαπανάομαι [Refs 5th c.BC+]; imperfect, [Refs 5th c.BC+]: aorist, [Refs 5th c.BC+] (aorist middle ἐδαπανησάμην [Refs 4th c.BC+]: perfect, [Refs 5th c.BC+]:— spend, [Refs 5th c.BC+]; δ. εἴς τι to spend upon a thing, [Refs 5th c.BC+]; τἀναλώματα πάντα ἐκ τῶν ἰδίων ἐδαπανῶμεν defrayed all expenses, interpolated in [Refs 4th c.BC+]:—passive, [Refs 5th c.BC+]middle (see. above), spend, [Refs 5th c.BC+]; δαπανηθεὶς οὐδέν uncertain reading in [Refs 4th c.BC+]

__2 consume, use up, ἡ φύσις δ. τὸν θορόν [Refs 4th c.BC+]:—passive, [Refs 4th c.BC+]; of time, [Refs 2nd c.AD+]; destroy, consume, φλὸξ δ. πάντα [Refs 1st c.AD+]; of persons, to be destroyed, ὑπὸ θηρίων [Refs 1st c.AD+]; καθάπερ ὑπὸ πυρός[Refs 1st c.BC+]; ὑπὸ νόσου or νόσῳ δαπανᾶσθαι [Refs 1st c.AD+] —middle, πυρὶ καὶ φόνῳ καὶ σιδήρῳ πάντα δαπανήσασθαι Eun.[prev. cited]
__II causal, τὴν πόλιν δαπανᾶν to put it to expense, exhaust it, [Refs 5th c.BC+]