1. Difficulties or barriers that are not immediately visible or apparent; concealed impediments to progress or success
The project faced hidden obstacles that weren't discovered until the final stages.
O projeto enfrentou obstáculos encobertos que não foram descobertos até as etapas finais.
2. In a figurative sense, undisclosed problems or challenges in a situation, relationship, or endeavor
Their marriage had hidden obstacles that eventually led to separation.
O casamento deles tinha obstáculos encobertos que eventualmente levaram à separação.