In producing an announcement about the United Service in the Week of Prayer for Christian Unity just now I very nearly added more than my usual amount of harm to inter-denominational relations by typing Untied. It being a proper word, the spell-checker missed it.
How about that? A six letter word which can be made to mean almost exactly its opposite by moving one straight line.
Next time the after-dinner conversation drags I suggest you throw that one in and watch the ice form, I mean break.