Reconstruction:Proto-Slavic/zudъ

Etymology
Not entirely clear:
 * Vasmer: Akin to 🇨🇬,, formally matching related 🇨🇬 (whence 🇨🇬). Possibly further related to 🇨🇬 (🇨🇬).
 * Preobrazhensky: Perhaps deverbal from homophonous onomatopoeia . For the semantic development, compare the phrase 🇨🇬 (literally: “to buzz on one's ear”).

Noun

 * 1) itch
 * 2) itchiness, irritation
 * 1) itchiness, irritation

Descendants

 * East Slavic: