English as a Second Language | A Layering of Perception

“The prefix un means not, reverse action, deprive of, release from.”

Great. What about UN as a prefix to verbs that don’t exist in the positive?

Undulate: Dulate. Not even a guess.

Unearth: Reearth? To earth does exist, much to my surprise.
* cover the root and lower stem of a plant with heaped-up earth.

English has un nouns as well.

Underwear: Derwear? Overwear, that’s a stretch. Outerwear? If so, why isn’t it Innerwear?

Uncuous: Cuous. Nope.

And then UN words that mean the same as their negative counterpart?

Unravel: Ravel? It means the same thing.
* untangle or unravel something

It’s a good thing English is my first language.

A Layering of Perception