This is the 2655th most frequent Japanese word.
柱
"Pillar" or "column."
Here, '柱' refers to the structural columns or supports that uphold the house. It is used in its literal sense.
この家の柱は非常に丈夫です。
The pillars of this house are very sturdy.
In this sentence, '柱' is metaphorical, signifying someone who is an essential support or foundation for the organization.
彼はその会社の重要な柱だ。
He is an important pillar of that company.
Here, '柱' is used abstractly to mean foundational principles or values that underpin one's life.