This is the 4675th most frequent Russian word.
достижению
"Achievement" or "attainment."
Here, "достижению" is used in the dative case as part of a gerund phrase to indicate the object of dedication, showing the goal being aspired to.
Я посвящаю все своё время достижению поставленных целей.
I dedicate all my time to achieving the set goals.
In this sentence, "достижению" is in the dative case, acting as part of a purpose clause, illustrating a method or goal.
Этот план был разработан для достижения наилучших результатов.
This plan was developed to achieve the best results.
Here, "достижению" is used in the prepositional case, forming a phrase that specifies the focus of the success.