orthogonal - or-THO-gon-ul - University of Michigan law professor Richard D. Friedman discovered when he answered a question from Justice Anthony M. Kennedy, then added that it was "entirely orthogonal" to the argument he was making. Friedman attempted to move on, but Chief Justice John G. Roberts Jr. stopped him.

"I'm sorry," Roberts said. "Entirely what?" "Orthogonal," Friedman repeated, and then defined the word: "Right angle. Unrelated. Irrelevant."
"Oh," Roberts replied.