Made by humans.
Intended to be worn on, or used by, the left hand.
Of a coordinate system: not following the right-hand rule.
Awkward or maladroit.
Using one's left hand in preference to, or more skillfully than, one's right.
Turning or spiraling from right to left; anticlockwise.
Performed with the intention of doing harm or in transgression against convention or taboo.
Insincere or malicious.
Left-handed people, taken as a whole.