static

First recorded in 1560–70; from New Latin staticus, from Greek statikós, equivalent to sta- (stem of histánai “to make, stand” ) + -tikos adjective suffix; see stand, -tic

The adjective static comes into English via New Latin staticus, which dates from the late 16th century and means “relating to weighing.”
Staticus is a straightforward borrowing of Greek statikós with the same meaning. Statica, the feminine singular of staticus, is short for ars statica “the art, science, or technique of weighing,” also dating from the late 16th century, and is a translation of Greek téchnē statikē (which, in the 16th century, wasn't just a matter of putting something on a postage meter or bathroom scale). Statikós is a derivative of the adjective statós “(of a horse or water) standing still.” Statics, the branch of mechanics that deals with bodies at rest or forces in equilibrium, is a derivative of Latin statica and Greek statikē.
The noun sense of static, used in telecommunications and electromagnetics, is a relatively new development, from the late 19th century. It refers to atmospheric electricity and the interference due to it. Out of this developed a figurative sense that we use informally today to complain about someone interfering with what we want to do (that is, giving us trouble or difficulty): “Stop giving me static about this!”