Tumbledown means falling into ruin through neglect. A tumbledown barn.
It goes before the noun and describes buildings rather than anything else. A tumbledown cottage is picturesque in a photograph and a great deal of work in life.
1adjectivetumbledownFalling into ruin through neglect.
“They bought a tumbledown farmhouse and spent nine years on it.”
tumbledown is a quality.
Deverbal from tumble down.
Etymology from Wiktionary, CC BY-SA