To make speedy or quick; to expedite or facilitate movement or progress (rare or obsolete variant).
A variant or related form of 'expedite,' built from Latin 'expedire' with an alternate Latin suffix pattern (-iate instead of -ite), showing how English adapted Latin verbs with different endings.
Some Latin verbs could enter English with multiple suffixes (-ite or -iate), and while most didn't survive, words like 'expediate' show the experimental phase of English vocabulary building from Romance languages.
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