swell out

To push outward and become rounder or bigger, like a sail filling with wind.

"The sails swelled out as the wind picked up and the yacht began to move."

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Deciphering Secrets of Ancient Civilizations, Noah's Ark, and Flood Myths | Lex Fridman Podcast #487

Lex Fridman · 5:08

got a sign for this idea." And so it began to swell out.

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