пеперуда

Etymology
From, , , , of disputed origin:
 * Mladenov: Derived via reduplication from or.
 * Meyer: Wanderword, akin to 🇨🇬, 🇨🇬, 🇨🇬, possibly of onomatopoeic nature.
 * Ultimately derived from 🇨🇬.

The ending has been compared to the suffix of 🇨🇬, itself of unclear origin.

Noun

 * 1) butterfly daytime lepidopterous insect of superfamily
 * 2)  type of embroidery ornament
 * 3)  fly-by-night
 * 4)  flower of family
 * 5)  Perperuna custom for evoking rain, common throughout the Balkans
 * 1)  Perperuna custom for evoking rain, common throughout the Balkans

Usage notes
The relation between the meaning “butterfly” and the name of the folk custom is uncertain. The later is sometimes associated with the pagan Slavic deity Perun, which may or may not be etymologically related.