desabotoar
1. to unfasten or open something by undoing buttons
She unbuttoned her coat as she walked inside.
Ela desabotoou seu casaco enquanto entrava.
2. to relax or become more open and candid in conversation
After a few drinks, he began to unbutton and share his feelings.
Depois de algumas bebidas, ele começou a se abrir e compartilhar seus sentimentos.
In American English, 'unbutton' is commonly used both literally for clothing and figuratively to mean 'relax and be more candid.' In Brazilian Portuguese, 'desabotoar' primarily carries the literal meaning, while the figurative sense might be expressed differently, such as 'se abrir' (to open up) or 'relaxar' (to relax).
NYC Slang
open up (when referring to the figurative meaning of becoming candid)
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