The term 'Certain Wind Instrument' can be solved by the four-letter word 'OBOE'. The OBOE is a double reed woodwind instrument that is part of the larger family of wind instruments known as the 'double reeds'. It is one of the most prominent instruments in classical music, and is used in orchestras, concert bands, and chamber music. The OBOE has a distinctive sound that is often described as 'haunting' or 'ETHEREAL'.