understand

Old English speakers used understandan from at least the 9th century CE. The compound joined under, meaning 'among' or 'between' rather than 'below', with standan, 'to stand'. The image was not one of subordination but of proximity: to be present in the midst of a thing, close enough to know it from the inside.

The spatial logic of the word mirrors how early Germanic communities thought about knowledge. Old High German had understantan; Old Saxon had understandan. In each case, the mental act of grasping a concept borrowed the physical image of a person who has positioned himself at the center of something and feels it on all sides.

By the 11th and 12th centuries, English scribes were using the word in religious and legal texts to mean comprehension of a divine command or a legal precedent. The sense of standing 'among the facts' gave the word its authoritative weight. A man who understands a law is not above it or below it; he is stationed within it.

The alternative theory, that under once meant 'before' rather than 'among', would make understandan closer to 'to stand before something and face it directly'. Linguist scholars of Germanic etymology have debated this reading since the 19th century. Either image, the one of standing before or standing among, puts the knower in a physical relation to the known.