Ramshackle is from alteration of earlier ramshackled, from ransackled, past participle of obsolete ransackle ('to ransack'), ultimately from Old Norse rannsaka ('to search a house'). The historical chain includes Old Norse rannsaka. Older glosses in the chain include "to ransack" and "to search a house", which help explain the semantic range of the modern word. Morphologically, ramshackle is best read as borrowing, yielding an English adjective shaped by both form history and later usage. In current English it functions as an adjective, with the sense "loosely held together and on the verge of collapse; rickety". related forms include ransack. The result is an English adjective whose etymology preserves the older forms while supporting the word's specialized modern meaning.