A phrase used to wish someone success and safety as they begin a journey or undertake something difficult.
From Middle English 'God spede thee,' combining 'God' and the verb 'spede' meaning to succeed or prosper. It's an archaic blessing that literally meant 'may God make you prosper.' The phrase dates back to at least the 15th century.
NASA famously transmitted 'Godspeed, John Glenn' to the astronaut in 1962 when he became the first American to orbit Earth—a 400-year-old blessing sent at the dawn of the space age!
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