Blackish is a term used to describe something that is dark or SOOTY in color. The term can be broken down into three words: SOOTY (5 letters), nigrescent (10 letters), and INKY (4 letters). SOOTY refers to something that is covered in soot, which is a black or dark gray powdery substance made up of particles from combustion. Nigrescent is an adjective meaning 'blackish' or 'dark gray'. INKY is an adjective meaning 'blackish' or 'dark in color'. Together, these three words form the term blackish, which is used to describe something that is dark or SOOTY in color.