fortuitous
US /fɔːrˈtuː.ə.t̬əs/
UK /fɔːrˈtuː.ə.t̬əs/

1.
fortuito, acidental
happening by accident or chance rather than design
:
•
The discovery of penicillin was a fortuitous event.
A descoberta da penicilina foi um evento fortuito.
•
It was a fortuitous coincidence that we met at the airport.
Foi uma coincidência fortuita que nos encontrássemos no aeroporto.
2.
afortunado, sortudo
happening by a lucky chance; fortunate
:
•
It was fortuitous that the train was delayed, as I almost missed it.
Foi fortuito que o trem estivesse atrasado, pois quase o perdi.
•
Their meeting was entirely fortuitous, but it led to a great partnership.
O encontro deles foi inteiramente fortuito, mas levou a uma grande parceria.