noun
hidden reserves of strength; latent energy; real strength
Refers to strength or ability that is not normally visible but emerges in difficult situations. Often used in sports, business, or personal challenges.
彼はピンチになると底力を発揮する。
He shows his hidden reserves of strength when he's in a pinch.
このチームにはまだ底力がある。
This team still has latent strength.