wane - n. 衰微,亏缺,变弱; v. 变小,亏缺,呈下弦;

• His fame was on the wane.
• The exploring enterprise of the Spanish nation did not wane after the conquest of Peru and Mexico, and the acquisition of the vast empire of the Indies.
• About half-past eight the combat began to wane, and the last shots were fired at ten.