uptight
adj. B2 Upper Intermediate US //əpˈtaɪt// UK //ʌptˈaɪt// up·tight
adj. feeling nervous, worried, or very strict about rules. You use this to describe someone who is too serious or has too much stress.
adj. characterised by excessive nervousness, anxiety, or a strict adherence to social conventions. Often used to describe a person's emotional state or a specific personality trait.
He is always so uptight about his appearance.
The manager was so uptight about the new safety rules that he made everyone feel uncomfortable.
Her uptight nature made it difficult for her to relax during the weekend, as she constantly checked her phone for work emails.