Rampage was originally Scots, early 18th century, probably from ramp ('to rear up, rage'), from Old French ramper ('to climb, crawl'). The historical chain includes Old French ramper. Older glosses in the chain include "to rear up, rage" and "to climb, crawl", which help explain the semantic range of the modern word. Morphologically, rampage is best read as borrowing, yielding an English noun and verb shaped by both form history and later usage. In current English it functions as a noun and verb, with the sense "a period of violent, frenzied, uncontrolled behavior". English derivatives include rampaging and rampager; related forms include ramp. The result is an English noun and verb whose etymology preserves the older forms while supporting the word's specialized modern meaning.