excel
雋 centers on the idea of excelling or standing out as superior. The single given meaning 'excel' is the core concept.
The exact historical development of 雋 is uncertain. It visually contains 隹 (short-tailed bird) above a lower component that may have contributed sound or meaning, but the original composition is not clearly established.
雋 has 隹 (bird) on top, suggesting something rising above. Picture a bird soaring higher than all others, excelling in flight.
For シュン, imagine a bird excelling so much it's soon (シュン) the champion of the sky: soon -> シュン.