That which is used for steadying anything; ballast.(noun)
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Use "ballasting" in a sentence
"One reason for deferring the masonry work as well as the ballasting was the inability to handle the necessary supplies."
"Much critical inquiry is directed to the propriety of Arthur's jib, or the necessity of "ballasting" or pouring a little molten lead into Edward's keel."
"The solution: to pack my tail—so to speak—with ballasting weights to compensate for any bothersome air pockets."