B1
something very good and difficult that you have succeeded in doing
Dictionary examples:
Getting out of bed before noon on weekends is my proudest achievement. (0.0)
Remembering all my passwords without writing them down is my biggest achievement. (0.0)
Surviving a family dinner without arguing is a major achievement in our house. (0.0)
It gives you a sense of achievement if you actually make it to the end of a very long book. (33.7)
An Olympic silver medal is a remarkable achievement for such a young athlete. (63.4)