the.com/sail
A wing that learned to swim, turning invisible wind into anywhere you want to go.
means A piece of fabric stretched to catch the wind and drive a boat across water; or, as a verb, to travel by such a craft.
from From Old English 'segl,' the cloth on a mast, with kin all across the Germanic family — Old Norse 'segl,' Dutch 'zeil,' German 'Segel.' The deeper root is uncertain; one suggestion ties it to a sense of 'cut piece' (a sail being a length of cut cloth), but that's speculative. What's solid is its age: Northern Europeans were naming this windcatching sheet long before they wrote much else down.
upwind trickSails generate lift like airplane wings, beating into wind
ancient techEgyptians sailed the Nile over 5,000 years ago
size mattersCutty Sark carried over 32,000 square feet of canvas
speed kingSailboats can outrun the wind pushing them