Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ηκόντιζεν Jonathan shot LXX.1Sam.20.37
ηκόντιζε shot LXX.1Sam.20.36
ακοντίζων shooting LXX.1Sam.20.20
ακοντίζω shall shoot LXX.1Sam.20.36

Liddell-Scott-Jones

ἀκοντίζω (akontizō) to shoot G:V

ἀκοντίζω-ίζω,

Attic dialect future -ιῶ, (ἄκων) hurl a javelin, τινός at one, Αἴαντος.. ἀκόντισε φαίδιμος Ἕκτωρ[ἀκοντίζωίσσαι 16.359">Refs 8th c.BC+]; . ἐς or καθ᾽ ὅμιλον, [Refs 8th c.BC+]: with dative, of the weapon, καὶ ἀκόντισε δουρί[Refs 8th c.BC+]; αἰχμαῖς[ἀκοντίζωίζουσι θαμειὰς αἰχμὰς ἐκ χειρῶν 8th c.BC: Ilias Homerus Epicus “Illiad” 12.44, compare 14.422">Refs 8th c.BC+]: absolutely, use the javelin, τοξεύειν καὶ .[Refs 5th c.BC+]:— passive, κῶλα.. ἐς πλευρὰ καὶ πρὸς ἧπαρ ἠκοντίζετο[Refs 5th c.BC+]

__2 after [Refs 8th c.BC+], hit or strike with javelin, or simply aim at, . τὸν σῦν[Refs 5th c.BC+]:—passive, to be hit or wounded, [Refs 5th c.BC+]
__3 hurl, throw, ἑαυτούς, i.e. leap overboard, [Refs 3rd c.AD+]; jettison cargo, [Refs]
__4 shoot forth rays, of moon, [Refs 5th c.BC+]:—middle, flash, [Refs 4th c.BC+]
__5 metaphorically, μῦθον[Refs 4th c.AD+]
__II intransitive, dart or pierce, metaphorically, of curses, εἴσω γῆς[Refs 5th c.BC+]