wiggle

This word conveys a sense of playful, erratic, or slight movement. In a physical sense, it often suggests a lack of stability or a deliberate attempt to loosen something. It carries a lighter, more informal tone than "shake" or "vibrate," often evoking images of animals or children.

When used in a professional or negotiating context, it refers to flexibility. The term "wiggle room" is a common idiomatic extension, describing the capacity to deviate from a strict plan or price. In these instances, the word shifts from a physical description to a metaphor for adaptability and compromise.