Huh, never associated that with Slavic culture. Cool word, "zakalka". In Polish there is "hartowanie" (https://en.wiktionary.org/wiki/hartowa%C4%87 https://en.w

Huh, never associated that with Slavic culture. Cool word, "zakalka". In Polish there is "hartowanie" (https://en.wiktionary.org/wiki/hartowa%C4%87 https://en.wiktionary.org/wiki/hartowa%C4%87), same meaning and also used in the context of exposing yourself to cold or difficulty. Related and a bit funny: people who swim in the winter are called "morsy" (walruses).