Bouzouki the "tetrachordo" ("four-course") has four pairs of strings. The name "bouzouki" comes from the Turkish word "bozuk", meaning "broken" or "modified", and comes from a particular re-entrant tuning called "bozuk düzen", which was commonly used on its Turkish counterpart, the "saz-bozuk". It is in the same instrumental family as the mandolin and the lute. Originally the body was carved from a solid block of wood, similar to the saz, but upon its arrival in Greece in the early 1910s it was modified by the addition of a staved back borrowed from the Neapolitan mandola, and the top angled in the
Irish traditional music form of improvised "countermelody" is often used in the accompaniments of bouzouki and guitar players. In contrast to many kinds of western folk music, there are no set chord progressions to tunes; many accompanyists use power chords to let the melody define the tonality or use partial chords in combination with ringing drone strings to emphasize the tonal center. Many guitarists use DADGAD tuning because it offers flexibility in using these approaches, as does the GDAD tuning for bouzouki. Like all traditional music, Irish folk music has changed slowly. Most folk songs are less than 200 years old. One measure