stumbling block

• Obstáculo ou problema que impede o progresso ou dificulta a realização de um objetivo.

An obstacle or problem that prevents progress or makes it difficult to achieve a goal.

1. Obstacle or hindranceB2formal

   A problem or difficulty that prevents progress or achievement.

   Obstáculo ou impedimento

   • Lack of funding was the main stumbling block for the project.
   • The negotiations hit a stumbling block over the contract terms.
   • His lack of experience proved to be a stumbling block in his career.