1. A beginning characterized by difficulties, obstacles, or problems; an initial period marked by challenges or setbacks
The new project had a bumpy start, but eventually things improved.
O novo projeto teve um começo difícil, mas eventualmente as coisas melhoraram.
2. A rough or turbulent beginning in any endeavor, relationship, or venture
Their relationship had a bumpy start, with many misunderstandings.
O relacionamento deles teve um começo difícil, com muitos mal-entendidos.