A.T. Robertson Commentary Revelation 3:16

"So because thou art lukewarm, and neither hot nor cold, I will spew thee out of my mouth." — Revelation 3:16 (ASV)

Lukewarm (χλιαρος). Tepid. Old adjective from χλιω, to liquefy, to melt, here alone in N.T.

I will (μελλω). "I am about to," on the point of.

Spew thee (σε εμεσα). First aorist active infinitive of εμεω, old verb to vomit, to reject with extreme disgust, here alone in N.T.