large, big
大 centers on the idea of largeness or bigness in size, scale, or importance.
large; big; great; huge; vast; major; important; serious; severe
large; big; great; major; important; serious; heavy; loud
safe; secure; sound; problem-free; without fear; all right; alright; OK; okay
big; large; great
Osaka (city, prefecture)
very; greatly; terribly; awfully
university; college
big; large; great
important; serious; crucial
biggest; greatest; largest; maximum
adult; grown-up
mass meeting; convention; rally; conference; assembly; gathering
liking very much; loving (something or someone); adoring; being very fond of
important; significant; serious; crucial
president (of a country)
large quantity; massive (quantity); mass (e.g. mass production, mass transit, mass destruction)
expansion; extension
huge; gigantic; enormous
cabinet minister
large; large-sized; large-scale; big
major company; big company
considerably; greatly; a lot
generally; on the whole; mostly; almost; nearly; approximately; roughly; about
majority; more than half; most (of)
大 is a pictograph of a person with arms and legs spread wide, conveying the idea of something large.
Picture a person standing with arms and legs stretched out as far as possible, making themselves look big: 大 means large.
For ダイ, imagine a giant die (as in dice) that is so large it takes up the whole room: die -> ダイ, and its size is 大.