Plural of etesian; the regular annual winds, especially those that blow in the Mediterranean and Aegean Sea.
From etesian (Greek etesios, meaning 'annual') plus -s plural suffix. The term originally referred specifically to the predictable northern winds of the ancient Mediterranean.
The etesians were so reliable that they shaped ancient Mediterranean civilization—entire trade routes, agricultural calendars, and even naval warfare tactics were built around knowing when these winds would blow.
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