1. to gradually weaken or diminish confidence, assurance, or conviction in something previously considered sure or definite
The repeated failures began to erode certainty about the project's success.
Os fracassos repetidos começaram a minar a certeza sobre o sucesso do projeto.
2. to progressively undermine faith or trust in a belief, claim, or established fact
New evidence continues to erode certainty regarding the original theory.
Novas provas continuam a minar a certeza quanto à teoria original.