Orthogonal

Orthogonal (link) — “At right angles. The term is used to describe electronic signals that appear at 90 degree angles to each other. It is also widely used to describe conditions that are contradictory, or opposite, rather than in parallel or in sync with each other.”

Why? I love the way it sounds, the way it rolls off my tongue. It also has a great sound of authority and knowledge — you don’t pull that one out unless you really, really mean what you’re saying. I use it occasionally in conversation for the “contradictory” definition, to my own thrill, usually accompanied by a single raised eyebrow.

Bunk Trudy