How Things Age

Rust, fading, patina, and decay — the vocabulary of how materials and objects weather and deteriorate over time, across five languages.

Pick a language, then save the deck and put yourself to the test.

German

Easy 5 words
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Medium 5 words
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Polydi the frog

Meet Polydi

Polydi is the adventurous, curious frog behind this dictionary — always jumping after one more word, following each entry's links just to see where they lead.

He's honest about what he knows and what he doesn't yet, so every entry comes with a quick practice question. And he likes keeping track of things, which is exactly why "My words" exists: save a word, and Polydi makes sure you actually come back and test yourself on it.

Jump in. Learn a word. Test yourself.

  • Curious
  • Honest
  • Keeps track