The Collaborative International Dictionary
Overmast
Overmast \O`ver*mast"\, v. t. (Naut.) To furnish (a vessel) with too long or too heavy a mast or masts.
Wiktionary
overmast
vb. To furnish with a mast or masts overly tall or heavy.
Usage examples of "overmast".
She had always been crank and overmasted, so that she lay down in a capful of wind.