It's often associated with ideas of:
* Hanging: Like in "pendant" (something hanging), "appendage" (something attached), and "suspend" (to hang).
* Weight or balance: Like in "pendulum" (a weight that swings) and "appendicitis" (inflammation of a hanging structure).
* Inclination or tendency: Like in "depend" (to rely on) and "expend" (to use up).
The root "pend" can be found in many English words and adds a sense of hanging, weight, or dependence.