Skyrocket is a compound of sky (from Old Norse sky 'cloud') and rocket (from Italian rocchetto 'bobbin', via French roquette), originally naming a firework that shoots upward. The historical chain includes Old Norse sky and Italian rocchetto. Older glosses in the chain include "cloud" and "bobbin", which help explain the semantic range of the modern word. Morphologically, skyrocket is best read as compound and borrowing, yielding an English verb and noun shaped by both form history and later usage. In current English it functions as a verb and noun, with the sense "to rise rapidly and steeply". related forms include sky and rocket. The result is an English verb and noun whose etymology preserves the older forms while supporting the word's specialized modern meaning.