Lexical Definition

‎σπένδω‎ spéndō (spen'-do) to pour a libation ^G:V
apparently a primary verb

(be ready to) be offered.

• to pour out as a libation, i.e. (figuratively) to devote (one's life or blood, as a sacrifice) ("spend")

Abbott-Smith

σπένδω [in LXX chiefly for נסך hi. ;]
to pour out as a drink-offering, make a libation; pass., fig., σπένδομαι, I am poured out or offered as a libation (in the shedding of my life-blood): Phl 2:17 (v. Lft., in l.), II Ti 4:6 (for exx. from π., v. Milligan, Selections, 114 f.; MM, xxiii).†

Abbott-Smith References

Liddell-Scott-Jones

σπένδω,

[Refs 8th c.BC+]; Epic dialect subjunctive 2nd pers. singular σπένδῃσθα [Refs 8th c.BC+]: Ionic dialect imperfect σπένδεσκον [Refs 8th c.BC+]: future σπείσω [LXX+5th c.BC+]: aorist ἔσπεισα [Refs 8th c.BC+]; Epic dialect σπεῖσα [Refs 8th c.BC+]; Epic dialect subjunctive σπείσομεν, for -ωμεν, [Refs]: perfect ἔσπεικα [Refs 1st c.AD+]:—middle, aorist ἐσπεισάμην [Refs 5th c.BC+]:—passive, aorist ἐσπείσθην [Refs 1st c.AD+]perfect ἔσπεισμαι, see below [Refs] near the end:—make a drink-offering (because before drinking wine a portion was poured on the table, hearth, or altar), σπεῖσάν τ᾽ ἔπιόν θ᾽ ὅσον ἤθελε θυμός [Refs 8th c.BC+]: with dative of the god to whom the libation was made, σέπας ἑλὼν σπείσασκε θεοῖσιν [Refs 8th c.BC+]; τὴν (i.e. κύλικα) δὲ θεοῖς σπένδεις [Refs 6th c.BC+]; κρητῆρας σπενδέτω probably let him dedicate them by pouring an offering from them, [Refs 5th c.BC+] —the liquid poured is mostly in _accusative_, σ. οἶνον pour wine, [Refs 8th c.BC+]; σπονδάς, χοάς, [Refs 5th c.BC+]; elliptically, σ. ἀγαθοῦ δαίμονος (i.e. σπονδήν) [Refs 5th c.BC+]; σ. οἴνου (partitive genitive) [Refs 2nd c.AD+] rarely with dative _of things_, ὕδατι σ. make a drink-offering with water, [Refs 8th c.BC+]; Ὀλυμπίῳ σ. ἀοιδαῖς make libations with songs to Zeus, [Refs 8th c.BC+]:—passive, οὗτος θεοῖσι σπένδεται θεὸς γεγώς [Refs 5th c.BC+] I am offered (as a drink-offering) upon it, [NT]

__2 rarely without the religious sense, simply pour, τράγου οὖρον, as remedy for convulsions, [Refs 5th c.BC+]; ξίφος αἷμα τυράννων ἔσπ. [Refs]
__II middle, pour libations one with another, and, as this was the custom in making treaties or agreements, make a treaty, make peace, [Refs 5th c.BC+] — Constr., σπένδεσθαί τινι make peace with one, [Refs 5th c.BC+] give it pledges of safe conduct, [Refs 4th c.BC+]; so σ. τινί obtain a truce for one, [Refs 5th c.BC+]; σ. πρός τινας, for τισι, [Refs 5th c.BC+]; of a person, σπείσασθαι cum Bruto et Cassio, [Refs 5th c.BC+]; σ. ἐπὶ τοῖσδε on these terms, [Refs 5th c.BC+]: with infinitive alone, [Refs] having concluded a peace with them, [Refs 5th c.BC+]; νεῖκος ἐσπεῖσθαι make up a quarrel, [Refs 5th c.BC+]; σ. ἀναίρεσιν τοῖς νεκροῖς obtain a truce for taking up the dead, [Refs 5th c.BC+] —perfect ἔσπεισμαι is used in middle sense in [Refs 5th c.BC+]; but in passive sense, ἐσπεῖσθαι τὰς σπονδάς [Refs 5th c.BC+]: aorist, ἐσπείσθησαν ἀνοχαί [Refs 5th c.BC+], emphasis is laid on the act of one of the parties, and in [Refs 1st c.AD+] (Cf. Hittite š (i) pand- 'pour a libation', Latin spondeo.)

_{LSJ Scripture Refs: LXX.Num.28.7 ☩ Phil.2.17 ☩ 2Tim.4.6}