The Collaborative International Dictionary
Unballast \Un*bal"last\, v. t. [1st pref. un- + ballast.]
To free from ballast; to discharge ballast from.
--Totten.
Unballast \Un*bal"last\, a.
Not ballasted. [Obs. & R.]
--Addison.
Wiktionary
vb. (context transitive English) To remove the ballast from.
Usage examples of "unballast".
The train then went off for Pool Quay at a smart pace, considering that the rails were unballasted, and with the trucks loaded with juveniles, many of whom perhaps had this day their first trip by railway.
They cuddled up under a tarpaulin sheet and settled down for the night, when someone gave the wagon a shove and starting down an incline on the unballasted track it proceeded merrily on its way to Ynyslas.
As if his erotic past was lost, and his desires, undiluted and unballasted, were all pushed out in front of him, into the present and the actual.