1wor·ry 
/ˈwɚri/ verb
wor·ries; wor·ried; wor·ry·ing /ˈwɚri/ verb 1 : to think about problems or fears : to feel or show fear and concern because you think that something bad has happened or could happen [no obj] ▪ We didn't want you to worry. ▪ Don't worry. You'll be fine. ▪ Don't make your parents worry. ▪ When they didn't call after two hours, we began to worry. ▪ They were fine. We needn't have worried. — often + about ▪ Let the travel agent worry about the details. ▪ Haven't we got enough to worry about? ▪ We don't have to worry about choosing a restaurant. [=someone else will choose a restaurant] ▪ The nurse said her condition was nothing to worry about. [=her condition was not serious] ▪ I'll take care of it. Don't worry about a thing. — sometimes + over ▪ She worried over her husband's health. [+ obj] — + that ▪ Medical experts worry that a new strain of the virus will be more difficult to contain. ▪ We worry that children don't get enough exercise. ▪ My parents worry [=fear] that I won't go to college. 2 [+ obj] : to make (someone) anxious or upset : to cause (someone) to worry
▪ His poor health worries me. ▪ What's worrying you? [=what is causing you to feel upset?] ▪ It doesn't seem to worry him that rain is in the forecast. ▪ We didn't tell you about the accident because we didn't want to worry you. ▪ Don't worry yourself. [=don't be upset or concerned] ▪ He worried himself sick [=he was extremely worried] before the exam.
▪ His poor health worries me. ▪ What's worrying you? [=what is causing you to feel upset?] ▪ It doesn't seem to worry him that rain is in the forecast. ▪ We didn't tell you about the accident because we didn't want to worry you. ▪ Don't worry yourself. [=don't be upset or concerned] ▪ He worried himself sick [=he was extremely worried] before the exam.
not to worry
informal — used to say that there is no cause for concern or worry ▪ “It looks like we're almost out of milk.” “Not to worry. I'll get some more when I go to the store this afternoon.”
worry at [phrasal verb]
worry at (something) chiefly Brit 1 : to pull, twist, or bite (something) repeatedly
▪ The dog was in the corner worrying at a bone. 2 : to try to solve (a problem) by thinking about it for a long time
▪ She kept worrying at the problem all day.
▪ The dog was in the corner worrying at a bone.
▪ She kept worrying at the problem all day.
