klappersten

klapper (“clatter”) +‎ sten (“stone”)

klappersten c

1. (uncountable) rounded, often roughly fist-sized stones (formed by the action of water at a (sometimes former, due to post-glacial land uplift) beach)
2. (countable) one such stone

• klapperstensfält

• kullersten
• rullsten

• “klappersten”, in Svensk ordbok [Dictionary of Swedish] (in Swedish)
• “klappersten”, in Svenska Akademiens ordlista [Wordlist of the Swedish Academy] (in Swedish)
• “klappersten”, in Svenska Akademiens ordbok [Dictionary of the Swedish Academy] (in Swedish)