acorcharse

Reflexive-only, from corcho (cork): to go numb, like a limb falling asleep (se me acorchó la pierna), or for food to turn spongy/stale in texture (el pan se acorchó).

• Se me acorchó el pie de estar sentado tanto tiempo. — My foot fell asleep from sitting so long.
• El pan se acorchó porque lo dejamos fuera. — The bread went stale and spongy because we left it out.
• Con el frío, se le acorcharon los dedos. — Her fingers went numb from the cold.

Overlooking acorcharse as an equally common alternative to dormirse for a numb limb (se me durmió la pierna) — both are natural, but acorcharse also covers the food-texture sense that dormirse doesn't.