anxiety · noun U /æŋˈzɑɪ.ət̬.i/
anxiety
B2 the feeling of being very worried
Dictionary examples:
Children normally feel a lot of anxiety about their first day at school.
That explains his anxiety over his health.
Learner example:
On the other hand, if we consider this statement in general, we could infer that [the] teenage [years are] quite a good time in a person's life, as there is no stress or anxiety that is usually encountered later on in life. (First Certificate in English; B2; Greek)