109. (7.) Ordinary word-forms may be varied by the omission of one or more letters. This is sometimes done under some general law of ellipsis, as when we convert the st loop into a circle, and write mus'be instead of must be. (See Paragraph 153.) In other cases, a letter or several letters of a word are omitted, not in pursuance of any general phrasing principle, but arbitrarily, giving us what is called a "special phrase," as honorable Senator