"Ish" is a recently derived word (free root) conveying a sense of "so-so" or approximation. It is most commonly used as an adjective but occasionally as an adverb. I would not be at all surprised to see it appear in standard dictionaries within the next decade. Is there a term for the morphological process that derived the term "ish" from the derivational suffix "-ish"? Or is this an example of slang/colloquial usage?
Ish is listed in the OED as colloquial, first used 1986, and defined: