A proverb meaning that siblings, as they grow and change, may become distant and feel like strangers.
親が他界して相続でもめたとき、まさに『兄弟は他人の始まり』という言葉を思い出した。
When our parents passed and we argued over the inheritance, I really remembered the saying 'siblings become strangers.'
若いころは仲が良かったが、長年会わずにいたら本当に『兄弟は他人の始まり』になってしまった。
We were close when young, but after not seeing each other for years we truly became 'strangers as siblings.'