辶 is a already known Chinese Radical character which is 辵, and its explanation can be found at https://xiongzou.blogspot.com/2015/11/learn-one-chinese-character-day_14.html.
From the Oracle script of 于 -
and 
, we know that it is drawing of the music instrument 竽 or its sound chamber. The air flow inside 竽 is circuitous to create sound. Adding 辵 to it, the direct guess is to walk like the air move inside 竽, which is to walk circuitously. for example 迂回.
When there is a direct / better path to the success, somebody however would rather take the detour, or even fail, in order to follow out-dated rules or rites. 迂 is thus extended to describe such a person or ideas: for example 迂腐.
and , we know that it is drawing of the music instrument 竽 or its sound chamber. The air flow inside 竽 is circuitous to create sound. Adding 辵 to it, the direct guess is to walk like the air move inside 竽, which is to walk circuitously. for example 迂回.When there is a direct / better path to the success, somebody however would rather take the detour, or even fail, in order to follow out-dated rules or rites. 迂 is thus extended to describe such a person or ideas: for example 迂腐.
That is pretty much all for 迂, let us check its evolution history to see if we can get more information from it:
 |
| evolution history of 迂 |
Oracle script of 迂 - 
kind of tells everything: walking (
) in the way of roundabout (
). Follow image is a good representation of the scene:
kind of tells everything: walking () in the way of roundabout (). Follow image is a good representation of the scene: |
| 迂 |
And now it is time to enjoy a Chinese calligraphy with 迂 inside:
 |
| 不见倪迂今百年，故山乔木岭苍烟。 晴窗展卷观图画，淡墨依然景昔贤。 |
