درب بال‌پرنده‌ای

Wiktionary contributors (Wiktionary, German edition), extracted with Wiktextract (Wiktextract, Tatu Ylonen) and DBnary (DBnary, Gilles Sérasset, CC BY-SA 3.0)

Wikidata contributors

wordfreq 3.2 by Robyn Speer, data under CC BY-SA 4.0. Includes data from Wikipedia, OPUS OpenSubtitles 2018 (OPUS OpenSubtitles), the SUBTLEX word lists by Marc Brysbaert et al., Google Books Ngrams (Google Books Ngrams), ParaCrawl and the Leeds Internet Corpus.