to seal one's fate
01
to do something that ensures that someone or something fails or something unpleasant happens to them
![to [seal] {one's} fate definition and meaning](https://cdn.langeek.co/photo/46742/original/?type=jpeg "to [seal] {one's} fate definition and meaning")
Idiom
例
His refusal to wear a helmet while riding his motorcycle may seal his fate in the event of an accident.
Missing the crucial presentation may seal the project's fate, resulting in its failure to secure funding.
