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"

disturb the peace of mind of; afflict with mental agitation or distress; "I cannot sleep--my daughter's health is worrying me"

be on the mind of; "I worry about the second Germanic consonant shift"

lacerate by biting; "the dog worried his bone"

touch or rub constantly; "The old man worried his beads"