blemish - Dictionary definition and meaning for word blemish
see blame in it..if u blame some one then you put a black mark on his reputation
blam + ish -- blam -- blame --> a person is blamed of spoiling the beauty or appearance of something beautiful.
kisee pe blame lagana-- daag lagana-- hence blame = daag
blemish sounds like blaming, blaming is the only flaw or defect which our math teacher had when I was in school except that he was very good teacher