tamboura
noun
tam·bou·ra tam-ˈbu̇r-ə 
variants or tambura
: an Asian musical instrument resembling a lute in construction but without frets and used to produce a drone accompaniment to singing
Example Sentences
Recent Examples on the Web Then the two improvised for twenty minutes or so over an Indian tamboura drone. 
Alex Ross, The New Yorker, 9 Aug. 2021 And there were instruments galore: Harpsichords, tamboura, Mellotron, harmonium, woodwinds, and a variety of guitars, pianos, and tambourines. William Goodman, Billboard, 26 May 2017
Alex Ross, The New Yorker, 9 Aug. 2021 And there were instruments galore: Harpsichords, tamboura, Mellotron, harmonium, woodwinds, and a variety of guitars, pianos, and tambourines. William Goodman, Billboard, 26 May 2017 Word History
Etymology
Persian ṭambūra
First Known Use
1585, in the meaning defined above