Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
υπόκαιε fire up LXX.Ezek.24.5
υποκαιόμενον being fired up LXX.Jer.1.13
υποκαιομένουσ being fired up with LXX.Amos.4.2

Liddell-Scott-Jones

ὑποκαίω (hupokaiō) to fire up G:V

ὑποκαίω,

Attic dialect ὑποκάω, burn by applying fire below, τινὰς ζῶντας [Refs 1st c.BC+]; burn underneath, ὀστέα [Refs 5th c.BC+]; ξύλα . τῷ τρίποδι under the tripod, [Refs]; light sacrificial fires, compare ὑποκλαίω.

__2 light under, πῦρ [Refs 2nd c.AD+]:—passive, [Refs 4th c.BC+]
__3 . λέβητα, [κακκάβην], light a fire under it, [Refs 2nd c.AD+]
__4 heat a bath, [Refs 3rd c.AD+]
__II metaphorically in passive, . τινός to be inflamed by love for.., [Refs 1st c.BC+]; to be inflamed, φλύκταιναι -όμεναι [Refs 1st c.AD+]