swift, fast
迅 centers on high speed: something swift or fast in motion.
迅 combines the movement radical 辶 with 卂, which likely contributes the sound and the idea of speed or swift motion.
The movement radical 辶 suggests going, and the inside part 卂 looks like a fast, streamlined shape. Picture a swift messenger dashing along a path.
For ジン, imagine a swift genie (ジン) zooming along the path: genie -> ジン, and it moves with incredible speed.
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(very) quick; rapid; swift; speedy; prompt; expeditious
sudden peal of thunder; thunderclap
furious (energy, battle, etc.); frenzied (work, activity, etc.); ferocious
rousing oneself fiercely; being intensely stirred up
the (fast) pace at which life passes, and thus the nearness of death; promptitude of the changes of the times
irresistible force
with lightning speed
quick and decisive; fast and daring; swift and resolute
quick and decisive; fast and daring
violent thunder and fierce wind; rapidly changing situation; swift action