In Middle English, “trig” meant “trusty, nimble.” It’s of Scandinavian origin, and traces back to the Old Norse “tryggr” and Old English “trēowe,” both meaning “faithful.” It’s an adjective that means “neat and tidy in appearance,” or it can be a verb for making something neat and tidy. If you hear “trig” and have flashbacks to high school math class, you’re actually thinking about the abbreviation of “trigonometry,” which is a branch of math concerning the angles of triangles.