This is the 921st most frequent Russian word.
начинают
"Начинают" means "they begin" or "they start."
Here, 'начинают' functions to indicate the initiation of an action, 'starting.' It is used to denote the beginning of the process of starting something new.
Они начинают новый проект.
They are starting a new project.
In this sentence, 'начинают' describes the beginning of an activity—a habitual action that students undertake—when their study of English commences.
В школе дети начинают учить английский с первого класса.
In school, children start learning English from the first grade.
Here, 'начинают' is used to describe a recurring action in nature, emphasizing the onset of a process that happens seasonally.