Where does “einundzwanzigeckig” come from?

einundzwanzigeckig (German) comes from German Einundzwanzigeck, from German einundzwanzig, from German zwanzig, from German Seite, from German -ig, from German -jährig, from German Jahr, from Middle High German jār — year.

einundzwanzigeckig (German): icosihenagonal

Definitions

  1. icosihenagonal

Ancestry of “einundzwanzigeckig”, step by step

StepLanguageWordMeaning
1GermanEinundzwanzigeckicosihenagon
2Germaneinundzwanzigtwenty-one
3Germanzwanzigtwenty
4GermanSeiteside; face, side, surface of any...
5German-ig-y; forms adjectives from nouns; forms adjectives...
6German-jährigyears old; years lasting
7GermanJahryear
8Middle High Germanjāryear
9Old High Germanjāryear
10Proto-West Germanicjāryear
11Proto-Germanicjērąyear; name of the J-rune
12Proto-Indo-Europeanyeh₁r-year
Every word from Proto-Indo-European yeh₁r-Every word from German -igEvery word from Proto-Germanic jērą