The fourth angel poured out his bowl on the sun, and the sun was allowed to scorch people with fire.
OJBAnd harevi'i (the fourth) [malach, angel] poured out his ke'ara (bowl) onto the shemesh (sun), and it was given to the shemesh (sun) to scorch Bnei Adam with eish (fire).
TCENTThe fourth poured out his bowl on the sun, and the sun was permitted to scorch people with fire.
T4TThen the fourth angel poured out on the sun the wine/liquid that was in [MTY] his bowl. He enabled the sun to scorch people with fiery heat.