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Not firm or trusty; unsound; defective; treacherous; unsafe; as, a rotten plank, bone, stone. "The deepness of the rotten way." Knolles. Rotten borough. See under Borough. -- Rotten stone (Min.), a soft stone, called also Tripoli (from the country from which it was formerly brought), used in all sorts of finer grindin…

An unsound or worn-out horse, useful as a hack, and commonly of good appearance. Ld. Lytton.

Easily shaken; tottering; unsound; as, a shaky constitution; shaky business credit. [Colloq.]

To disorder; to derange; to render unsound; as, to be shattered in intellect; his constitution was shattered; his hopes were shattered. A man of a loose, volatile, and shattered humor. Norris.

ence of pleading. Stephen. The phrase is sometimes popularly applied to the specious, but unsound, argumentation of one whose aim is victory, and not truth. Burrill. -- Special property (Law), a qualified or limited ownership possession, as in wild animals, things found or bailed. -- Special session, an extraordinary…

value, and a consequent sale at a profit; -- often, in a somewhat depreciative sense, of unsound or hazardous transactions; as, to speculate in coffee, in sugar, or in bank stock.

To allege or prove to be of unsound mind, so that the performance of some act may be avoided.

g, or being thrown, out of equilibrium; hence, disordered or deranged in sense; unsteady; unsound; as, an unbalanced mind. Pope.

Unsoundness; disease.

Not whole; unsound. [Obs.]

Unsound; worthless; irresponsible; unsafe; -- said to have been originally applied to the notes of an insolvent bank in Michigan upon which there was the figure of a panther.