arcoiris
rainbow
arco
arch
+
iris
colored part of the eye
Arcoiris means rainbow and can be thought of as arco0 (arch0) + iris1 (colored part of the eye1), forming an 'arch of colors' in the sky.
noun
- rainbowA multicolored arc in the sky caused by the refraction of sunlight by rainVimos un hermoso arcoiris después de la lluvia. // We saw a beautiful rainbow after the rain.