tummeln

The German verb "tummeln" means "to frolic", "to gambol," or "to agitate". It suggests lively, brisk, and often playful activity. Typically, "tummeln" implies movement and activity by multiple entities, such as in "Sich tummeln," which refers to many people or animals bustling or moving actively in a space.

Similar verbs in German that indicate lively movement or activity include "wuseln" (to bustle), "toben" (to romp or rage), and "sich bewegen" (to move).