open-necked
US /ˌoʊ.pənˈnekt/
UK /ˌoʊ.pənˈnekt/

1.
de gola aberta, sem gola
having a collar that is not fastened at the neck, or no collar at all
:
•
He wore an open-necked shirt to the casual dinner.
Ele usava uma camisa de gola aberta para o jantar casual.
•
The dress had an elegant open-necked design.
O vestido tinha um design elegante de gola aberta.