This is the 386th most frequent Lithuanian word.
veiksmų
"Veiksmų" means "actions" or "acts" in English.
In this sentence, 'veiksmų' relates to actions needing improvement, functioning as a genitive plural form.
Mums reikia plano veiksmų gerinimui.
We need a plan for improving actions.
Here, 'veiksmų' defines the type of process (actions), illustrating a genitive plural case in a descriptive role.
Veiksmų eiga priklauso nuo situacijos.
The course of actions depends on the situation.
In this context, 'veiksmų' explains whose success (actions' success), showing ownership or relation through the genitive plural case.