Where does “опёнок” come from?

опёнок (Russian) comes from Russian -о́к, from Proto-Slavic -ъkъ, from Proto-Slavic -kъ, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

опёнок (Russian): honey fungus of the genus Armillaria of edible parasitic mushrooms with a yellow cap and thin stalk that live on trees and woody shrubs, especially Armillaria mellea, that usually grow in groups on tree roots, stumps, and felled trees

Definitions

  1. honey fungus of the genus Armillaria of edible parasitic mushrooms with a yellow cap and thin stalk that live on trees and woody shrubs, especially Armillaria mellea, that usually grow in groups on tree roots, stumps, and felled trees

Ancestry of “опёнок”, step by step

StepLanguageWordMeaning
1Russian-о́кtakes masculine nouns, produces diminutive masculine nouns, sometimes with further sense development
2Proto-Slavic-ъkъForms diminutives from old u-stem nouns;...
3Proto-Slavic-kъDeverbal, forms token nouns; From expressive or...
4Proto-Indo-European-kosCreates deadjectival and desubstantival...
Every word from Proto-Indo-European -kosEvery word from Russian -о́кEvery word from Proto-Slavic -kъ