To feel or express undue care and anxiety; to manifest disquietude or pain; to be fretful; to chafe; as, the child worries; the horse worries.

A state of undue solicitude; a state of disturbance from care and anxiety; vexation; anxiety; fret; as, to be in a worry.

something or someone that causes anxiety; a source of unhappiness; "New York traffic is a constant concern"; "it's a major worry"

a strong feeling of anxiety; "his worry over the prospect of being fired"; "it is not work but worry that kills"; "he wanted to die and end his troubles"

be worried, concerned, anxious, troubled, or uneasy; "I worry about my job"

be concerned with; "I worry about my grades"

Interest paid on trouble before it falls due.

A well accepted theory of anxiety originally posited by Liebert and Morris in 1967 suggests that anxiety consists of two components; worry and emotionality. Emotionality refers to physiological symptoms such as sweating, increased heart beat and raised blood pressure.