1. An uncertain, unstable, or problematic start to something, characterized by lack of confidence, instability, or difficulties
The new business had a shaky beginning, but eventually became successful.
O novo negócio teve um começo incerto, mas eventualmente se tornou bem-sucedido.
2. A start that lacks a solid foundation or shows signs of weakness from the outset
Their relationship got off to a shaky beginning due to miscommunication.
Seu relacionamento teve um começo vacilante devido a mal-entendidos.