worry

be on the mind of

“I worry about the second Germanic consonant shift”

something or someone that causes anxiety; a source of unhappiness

“it's a major worry”

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”

a strong feeling of anxiety

“his worry over the prospect of being fired”

be worried, concerned, anxious, troubled, or uneasy

“I worry about my job”

lacerate by biting

touch or rub constantly