Be anxious is a term used to describe a feeling of unease or apprehension. FRET, WORRY, and STEW are all words that can be used to describe this feeling. FRET is a verb meaning to feel or show extreme anxiety or discontent. WORRY is a verb meaning to feel or cause to feel anxious or troubled about actual or potential problems. STEW is a verb meaning to be in a state of anxious agitation or uncertainty. All three words can be used to describe the feeling of being anxious.