брат

брат

Brother.

Here, 'брат' is used to mean a sibling, specifically a male one, referring to a family relationship commonly used in introduction contexts.

Мой брат любит играть в шахматы.

My brother likes to play chess.

In this instance, 'брат' is used colloquially and informally as a friendly term, not necessarily indicating a familial relationship, similar to 'bro' in English.

Привет, брат, как дела?

Hi, brother, how are you?

'Братьев' here stems from 'брат' and is employed metaphorically to denote close comrades or companions, often used in military or fraternal contexts.

На войне он потерял многих боевых братьев.

In war, he lost many of his battle brothers.