English term
set your mouth grimly
Time seems to loop like the movie Ground Hog Day — every day is like the one before. The only sign of growth is the mold on your shower curtain. Everyone is sick of book work. Every day is a near occasion of scolding. You set your mouth grimly. Fine. Let’s just finish the books and check off the days.
Proposed translations
Bachelor of Pharmacy
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Slovenian to Portuguese, Portuguese to English, and 1 more.
aperta os lábios
https://ell.stackexchange.com/questions/178013/what-does-his...
Por mais que tente disfarçar, ao exibir esse gesto no rosto, deixará claro para as pessoas ao seu redor que você está sob um alto grau de estresse. É uma expressão facial muito comum quando as pessoas precisam encarar situações que preferiam evit
Brazil
If professionalism is what you need.
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese
Põe uma expressão triste no rosto
você parece preocupado
Portuguese to English, English to Portug
Native in: English 
Works in: Portuguese to English, English to Portuguese
fica determinado
Portugal
Translator and Terminologist
Native in: Portuguese
Works in: English to Portuguese, French to Portuguese, Spanish to Portuguese
pôr um ar carrancudo/ficar mal-humorado
Brazil
Translation| Localization| Transcreation
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, French to Portuguese, and 1 more.
Brazil
English/Portuguese Translator, Subtitler
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English, Portuguese, and 1 more.
Something went wrong...