pandereta
tambourine
pandero
tambourine
+
-eta
diminutive suffix
A pandereta is a tambourine that is smaller1 (-eta1) than a larger type of tambourine0 (pandero0).
noun
- tambourineA small tambourineLa niña tocaba la pandereta en la banda escolar. // The girl played the tambourine in the school band.