English

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The red sail is the mainsail.

Etymology

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From main +‎ sail.

Pronunciation

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Noun

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mainsail (plural mainsails)

  1. (nautical) The largest (or only) sail on a sailing vessel.

Synonyms

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  • main (mainsail)

Translations

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References

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  1. ^ Jespersen, Otto (1909) A Modern English Grammar on Historical Principles (Sammlung germanischer Elementar- und Handbücher; 9)‎[1], volumes I: Sounds and Spellings, London: George Allen & Unwin, published 1961, § 9.62, page 268.