brotherly
US /ˈbrʌð.ɚ.li/
UK /ˈbrʌð.ɚ.li/

1.
of or like a brother or brothers, especially in being kind, affectionate, or protective
:
•
He showed a deep brotherly affection for his younger sibling.
•
They shared a strong brotherly bond.
of or like a brother or brothers, especially in being kind, affectionate, or protective