kaio describes being on fire or burning, including lamps, fire, and hearts stirred during speech.

The attested use most often depicts something in a state of burning: lamps, fire, a star, a mountain-like object, and a lake are described as burning, while John 15:6 and Matthew 13:40 place what is burned in fire. A single active form concerns lighting a lamp, and Luke 24:32 uses the same burning language for hearts during a conversation.

1. Being aflame or undergoing burning · dominant

   Present passive forms describe lamps and fire as burning in John 5:35, Luke 12:35, Revelation 4:5, Revelation 8:8, Revelation 8:10, Revelation 19:20, and Revelation 21:8. The same passive construction occurs where branches are thrown into fire in John 15:6 and weeds are burned with fire in Matthew 13:40; in 1 Corinthians 13:3, the future passive form concerns handing over a body "to be burned."

   John 5:35Luke 12:35John 15:6Matthew 13:40Revelation 19:20Revelation 4:5
2. Lighting a lamp · rare

   In Matthew 5:15, the third-person present active plural form occurs in the clause about people lighting a lamp and placing it on a lampstand. The APB renders the action "light a lamp."

   Matthew 5:15
3. Hearts burning within · rare

   In Luke 24:32, a present passive feminine participle is used of hearts "burning within us" while the speaker was opening the Scriptures. The clause extends burning language beyond visible fire or lamps to the hearers' hearts.

   Luke 24:32

In the Anselm Project Bible: The APB uses "burning," "burned," "blazing," and "light" across these verses; it renders the active lamp clause in Matthew 5:15 as "light a lamp." Because the APB is a whole-verse translation, those variations do not by themselves establish separate meanings.