The compound adjective "weed-grown" is a transparent formation from two native English elements. "Weed" originates from the Old English wēod, a general term for any herb, grass, or plant, which later specialized to mean an unwanted or troublesome plant. "Grown" is the past participle of "grow," from Old English grōwan, meaning to flourish or increase in size. When combined, the term literally describes land or an area that has "grown weeds," directly conveying the modern sense of being covered or overrun by them. This compound follows a common Germanic pattern of creating descriptive adjectives by pairing a noun with a participle.

Structure: weed (a wild plant) + grown (past participle of grow) - weed: From Old English wēod (herb, grass, weed), of Germanic origin. - grown: Past participle of grow, from Old English grōwan (to grow, flourish), of Germanic origin.