MEANING: adjective:
1. Of little value; trifling.
2. Having no force; ineffective.

ETYMOLOGY: From Latin nugatorius (trifling), from nugari (to trifle). Earliest documented use: 1603.

MUGATORY - what many a Whig would like to do (but instead, being Gentlemen, they content themselves with NAGATORY)

NEGATORY - military slang for the opposite of "affirmative"

NUTATORY - pertaining to nodding movement, more specifically to the perturbation of the axis of a spinning symmetrical object in a gravitational field (actually that may be a real word; see NUTATION)