knockdown

adjective

1. capable of knocking something down; overwhelming; irresistible: a knockdown blow.
2. constructed in separate parts that can readily be taken apart for easy storage, shipping, etc.: a knockdown toolshed.
3. offered or acquired for less than the prevailing rate: first-rate goods at knockdown prices.

noun

4. a knockdown object.
5. an act or instance of knocking down, especially by a blow.
6. something that fells or overwhelms.
7. reduction or lowering, as in price or number: The store offered a knockdown of 15 percent to its own employees.
8. Slang. an introduction, especially to a person: He gave me a real knockdown to the company.
9. Nautical. the capsizing of a small boat as a result of a strong gust of wind.