Here you will find one or more explanations in English for the word Unballast.
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Unballast
Unballast Un*bal"last, v. t. [1st pref. un- + ballast.]
To free from ballast; to discharge ballast from. --Totten.
Unballast
Unballast Un*bal"last, a.
Not ballasted. [Obs. & R.] --Addison.
Meaning of Unballast from wikipedia