He improved his wicket-keeping skills through years of practice.

wicket-keeping 是由 wicket（板球的三柱门）和 keeping（防守、看守）组成的复合词，指在板球运动中防守三柱门的守门员职责。 keeping 来自动词 keep（保持、看守），这里指"防守"的动作。 wicket-keeping 特指板球运动中守门员防守三柱门的技术和职责。