dried that has been made soft in water, or water and lye (= a chemical) in order to remove the hard outer part of the grain

You need to soak the corn kernels for a long time before boiling them to make hulled corn. 玉米粒需要先浸泡很长时间，然后才能煮沸制成去壳玉米。

Hulled corn is just another name for hominy. 去壳玉米只是玉米粥的别称。