There seems to be a discrepancy as to whether the word guitar is rooted in Persian or Greek. The Greek etymology points to kitara, but if I'm not mistaken the affix -tar doesn't have Greek cognates or am I wrong? In any case according to the historical evidence the long neck stringed instrument traces back to Susa. From what I understand tar means "string" in Persian. There is the yektar "one string," dotar "two string," cetar "three string," chartar (cf. Sp. quatro) "four string," sheshtar "guitar (minus the hollow body)." Where could the prefix gui- have derived from in Persian?