Ideographic: To escape 辶 to shelter 盾; 盾 also provides the pronunciationRadical:

meaning for dùn:

  • - to evade
  • - to flee
  • - to escapeto escape
  • - to disappearto vanish
  • - to hide
  • - to cover one's tracesto hide (from the world)to take refuge in religious lifeto hide one's face and retreat (idiom)