Isn't is a hand engraved and oxidized ring of the word isn't. Isn't is a contraction of "is not", a grammatical shortening of two written or spoken words, into one, by the omission of internal letters. To some extent, isn't is a whole new word beyond is and not. Sacrificed is the O, and turned into an apostrophe. The seperation and integration of these words, as well as the meaning of isn't or is not, as something missing, are put onto the external size of an O, the ring itself.