Artificial intelligent assistant

betas

betas Obs. rare—1.
  [a. ON. beiti-áss sailyard, ? f. beita to make the ship catch the wind, to tack + áss pole, yard; cf. windlass, in ME. windas, in ON. vindáss.]
  A sailyard.

c 1330 R. Brunne in Layamon III. 396 Som aforced the wyndas, Som the lofe, som the betas.

Oxford English Dictionary

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