means How fast something moves or happens — the rate at which distance is covered or change occurs over time.

from From Old English 'spēd,' which first meant success, prosperity, or good fortune — to speed someone was to help them thrive, a sense that survives in the old blessing 'God speed.' Only later did the word shift from prospering toward the swiftness that brings success, and finally to pure velocity. A cousin of Dutch 'spoed' and Old High German 'spuot,' likely from a Proto-Germanic root tied to thriving and abundance.