2. Clumsy; awkward; unlucky; insincere; sinister; malicious; as, a left-handed compliment. The commendations of this people are not always left-handed and detractive. (Landor)
3. Having a direction contrary to that of the hands of a watch when seen in front; said of a twist, a rotary motion, etc, looked at from a given direction. Left-handed marriage, a morganatic marriage. See Morganatic. Left-handed screw, a screw constructed to advance away from the observer, when turned, as in a nut, with a left-handed rotation. An ordinary wood screw is right-handed.