Over leapt refers to the action of jumping over or skipping past something. Its antonyms would be words that describe the opposite action. These words include "under", "below", "beneath", "sink", "dip", "descend", "lower", "drop", "fall", "plunge", "settle", "land", "touch down". These words imply moving downwards, rather than upwards like over leapt does. These antonyms can be used in sentences to describe actions that involve going below something or coming down to the ground. For instance, "The aircraft dipped beneath the cloud layer" can replace "The aircraft over leapt the cloud layer.