Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αποσβεσθήσεται shall be consumed LXX.Isa.10.18
αποσβέννυται extinguished LXX.Prov.31.18

Liddell-Scott-Jones

ἀποσβέννυμι (aposbennumi) to consume G:V

ἀποσβέννυμι-σβέννῡμι

(ἀποσβέννυμισβεννύω[Refs 1st c.AD+], extinguish, quench, τὸ φῶς[Refs 5th c.BC+]; ἰόν [Refs 1st c.AD+]; Grammars, extinguish, i.e. lose, τὸν τόνον, of enclitics, [Refs 2nd c.AD+]

__II passive, present in [Refs 5th c.BC+]:— middle, future ἀποσβέννυμισβήσομαι[Refs 5th c.BC+]: aorist 2 and perfect active intransitive, ἀπέσβην[Refs 5th c.BC+]: aorist 1 passive ἀπεσβέσθην[Refs 5th c.BC+]: perfect ἀπέσβεσμαι[Refs 4th c.BC+]:—to be extinguished, go out, vanish, die, cease, [same places]; of a woman's milk, [Refs 5th c.BC+]