A support or prop — something that physically holds something up or someone/something that provides emotional or financial support.
屋根は古い柱で支えられている。
The roof is supported by old pillars.
家族が私の最大の支えだ。
My family is my greatest support.
経済的な支えがないと留学は難しい。
Without financial support, studying abroad is difficult.
回復には精神的な支えも必要だ。
Emotional support is also necessary for recovery.