The term 'Blind Unit' is composed of four words: SLAT (4 letters), SEMI (4 letters), SLATS (5 letters), and DATE (4 letters). SLAT is an acronym for 'Shutter Louver and Tilting', which is a type of window covering that consists of horizontal SLATS that can be opened and closed. SEMI is short for 'SEMI-opaque', which means that the material is partially transparent. SLATS are the individual pieces of material that make up the window covering. Finally, DATE stands for 'Daylight Adjustable Translucent Element', which is a type of window covering that allows natural light to pass through while still providing privacy.