Lexical Definition

‎κενόω‎ kenóō (ken-o'-o) to empty G:V
from ‎κενός‎

make (of none effect, of no reputation, void), be in vain.

Usage: 6 forms in 7 verses
Form Translated As     In Verse(s)
ἐκένωσεν emptied Phil.2.7
κενώσει will make void 1Cor.9.15
κενωθῇ may be emptied of power 1Cor.1.17
may be made void 2Cor.9.3
κεκένωται has been made void Rom.4.14
εκενώθησαν are emptied LXX.Jer.14.2
εκενώθη was emptied LXX.Jer.15.9

Abbott-Smith

κενόω, -ῶ (< κενός, q.v.), [in LXX: Je 14:2 15:9 (אמל pu.)*;]
to empty. Metaph., to empty, make empty, vain or of no effect: καύχημα, I Co 9:15; ἑαυτόν, of Christ, Phl 2:7 (v Lft.; ICC, in l, and esp. Gifford, Incarn., 54 ff.); pass., πίστις, Ro 4:14; ὁ σταυρός, I Co 1:17; καύχημα, II Co 9:3.†

Abbott-Smith References

Book Refs
Jeremiah 14:2 · 15:9
Romans 4:14
1 Corinthians 1:17 · 9:15
2 Corinthians 9:3
Philippians 2:7

Liddell-Scott-Jones

κενόω,

[Refs 5th c.BC+]; Epic dialect κεινόω [Refs 2nd c.BC+]: future κενώσω [Refs 5th c.BC+]: aorist ἐκένωσα [Refs]: perfect κεκένωκα [Refs 2nd c.AD+]:—passive, future κενωθήσομαι [Refs 5th c.BC+]: aorist ἐκενώθην [Refs 5th c.BC+]: perfect κεκένωμαι [Refs 5th c.BC+]: (κενός): —empty, πᾶσαν ἠπείρου πλάκα [Refs 5th c.BC+][same place]: with genitive, empty of a thing, ἀνδρῶν τάνδε πόλιν κενῶσαι [Refs 5th c.BC+]; χέρας [δώρων] [Refs 3rd c.BC+]; opposed to πληροῦν τινά τινος, Pl.[same place],[Refs]:—passive, to be emptied, made or left empty, [Refs 5th c.BC+]; ἐς τὸ κενούμενον into the space continually left empty, [Refs 5th c.BC+] will be left without them, Emp.[same place]; κεκενωμένου τοῦ τείχεος πάντων stripped of all things, Hdt. [prev. cited]

__2 make a place empty by leaving it, desert it, βωμοῦ ἐσχάραν [Refs 5th c.BC+]; λόχμην [Refs][same place]:—passive, κενωθεισῶν τῶν νεῶν [Refs 5th c.BC+]
__3 in Medicine texts, empty by depletion, opposed to πληροῦν, [Refs 5th c.BC+], Gal.[same place]; τινα [Refs 1st c.BC+] O.; carry off, αἷμα [Refs 2nd c.AD+] —passive, τὰ κενούμενα evacuations, [Refs 2nd c.AD+]
__4 empty out, pour away, φάρμακον [Refs 2nd c.AD+] falsa lectio in [Refs 1st c.AD+]:—passive, τοῦ λαοῦ κενωθέντος [Refs 1st c.BC+]; make away with, θανάτου βάρος [Refs 5th c.AD+]
__5 expend, εἴς με κένωσον πᾶν βέλος [Refs 1st c.BC+]
__6 in passive, waste away, shrivel, [Refs 4th c.BC+]
__II metaphorically, make empty, ἑαυτόν [NT]; make void or of no effect, καύχημα [NT+2nd c.AD+]:—passive, to be or become so, [NT]

LSJ Scripture Refs: Phil.2.71Cor.9.15Rom.4.14