Where does “редкостный” come from?

редкостный (Russian) comes from Russian ре́дкость, from Russian ре́дкий, from Proto-Slavic rědъkъ, from Proto-Balto-Slavic redʔ-.

редкостный (Russian): rare, unique, uncommon

Definitions

  1. rare, unique, uncommon

Ancestry of “редкостный”, step by step

StepLanguageWordMeaning
1Russianре́дкостьrarity, uncommon thing; scarcity
2Russianре́дкийrare, unfrequent
3Proto-Slavicrědъkъsparse, rare
4Proto-Balto-Slavicredʔ-—
Every word from Proto-Balto-Slavic redʔ- →Every word from Proto-Slavic rědъkъ →Every word from Russian ре́дкий →