The term Greek Harp is composed of two crossword solutions, LYRE (4 letters) and Trigon (6 letters). A LYRE is a stringed musical instrument of the harp family that was used in ancient Greece. It was typically played by plucking the strings with the fingers or a plectrum. A trigon is a three-cornered musical instrument that was also used in ancient Greece. It was usually made of wood and had three strings that were plucked with the fingers. Together, these two instruments form the Greek Harp.