From G4448; {ignition} that {is} (specifically) smelting (figuratively {conflagration}calamity as a test): - {burning} trial.
Verse
Matrix
Rev 6:4And there went out another horse that was redG4450: and power was given to him that sat thereon to take peace from the earth, and that they should kill one another: and there was given unto him a great sword.
Rev 12:3And there appeared another wonder in heaven; and behold a great redG4450 dragon, having seven heads and ten horns, and seven crowns upon his heads.