By main strength

Main \Main\ (m[=a]n), a. [From {Main} strength, possibly
   influenced by OF. maine, magne, great, L. magnus. Cf.
   {Magnate}.]
   1. Very or extremely strong. [Obs.]
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            That current with main fury ran.      --Daniel.
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   2. Vast; huge. [Obs.] "The main abyss." --Milton.
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   3. Unqualified; absolute; entire; sheer. [Obs.] "It's a man
      untruth." --Sir W. Scott.
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   4. Principal; chief; first in size, rank, importance, etc.;
      as, the main reason to go; the main proponent.
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            Our main interest is to be happy as we can.
                                                  --Tillotson.
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   5. Important; necessary. [Obs.]
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            That which thou aright
            Believest so main to our success, I bring. --Milton.
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   {By main force}, by mere force or sheer force; by violent
      effort; as, to subdue insurrection by main force.
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            That Maine which by main force Warwick did win.
                                                  --Shak.
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   {By main strength}, by sheer strength; as, to lift a heavy
      weight by main strength.

   {Main beam} (Steam Engine), working beam.

   {Main boom} (Naut.), the boom which extends the foot of the
      mainsail in a fore and aft vessel.

   {Main brace}.
      (a) (Mech.) The brace which resists the chief strain. Cf.
          {Counter brace}.
      (b) (Naut.) The brace attached to the main yard.

   {Main center} (Steam Engine), a shaft upon which a working
      beam or side lever swings.

   {Main chance}. See under {Chance}.

   {Main couple} (Arch.), the principal truss in a roof.

   {Main deck} (Naut.), the deck next below the spar deck; the
      principal deck.

   {Main keel} (Naut.), the principal or true keel of a vessel,
      as distinguished from the false keel.
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   Syn: Principal; chief; leading; cardinal; capital.
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