Meaning

noun distance travelled per unit time

noun a rate (usually rapid) at which something happens

noun changing location rapidly

originFrom Middle English sped (“prosperity, good luck, quickness, success”), from Old English spēd (“success”), from Proto-West Germanic *spōdi (“prosperity, success”), from Proto-West Germanic *spōan, from Proto-Germanic *spōaną (“to prosper, succeed, be happy”), from Proto-Indo-European *speh₁- (“to prosper, turn out well”). Cognate with Scots spede, speid (“success, quickness, speed”), Dutch spoed…

Etymology from Wiktionary, CC BY-SA 3.0