In the dictionary, worry is defined as both a noun (“I am free of worry”) and as a verb (e.g., “I worry about my children”). Functionally, the act of worrying is a mental behavior that results in a feeling of anxiety (nervousness or unease). On top of this, the feeling of anxiety can trigger the behavior of worrying, which becomes cyclical: Trigger: Anxiety Behavior: Worry Result: Feel more anxious