waned

To progressively lose its splendor, value, ardor, power, intensity etc.; to decline.

Said of light that dims or diminishes in strength.

Said of the Moon as it passes through the phases of its monthly cycle where its surface is less and less visible.

Said of a time period that comes to an end.

To decrease physically in size, amount, numbers or surface.

To cause to decrease.

Having wanes, i.e. rounded corners caused by lack of wood, often showing bark.