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bal·last

ballast

 
 
pronunciation:
bae lihst
parts of speech:
noun, transitive verb
features:
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part of speech: noun
definition 1: heavy material placed in the hold of a boat or ship to make it more stable.
definition 2: heavy material placed in the car of a balloon to make it more stable.
definition 3: gravel or crushed rock under the rails and ties of a railway to increase stability.
 
part of speech: transitive verb
inflections: ballasts, ballasting, ballasted
definition: to provide with ballast; stabilize.
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  boat