Where does “tweedekker” come from?

tweedekker (Dutch) comes from Dutch dek, from Middle Dutch dec, from Middle Dutch decken, from Old Dutch thecken, from Proto-West Germanic þakkjan, from Proto-Germanic þakjaną, from Proto-Germanic þaką, from Proto-Indo-European (s)teg- — to cover; pole, stick, beam.

tweedekker (Dutch): biplane; a ship with two decks

Definitions

  1. biplane; a ship with two decks

Ancestry of “tweedekker”, step by step

tweedekker traces back through two separate lines of ancestry.

via Dutch dek

StepLanguageWordMeaning
1DutchdekA deck; A cover; A surface
2Middle Dutchdecroof, covering
3Middle Dutchdeckento roof, to build/repair a roof; to cover; to...
4Old Dutchtheckento cover; to roof
5Proto-West Germanicþakkjanto cover; to burn
6Proto-Germanicþakjanąto cover; to burn
7Proto-Germanicþakąroof, cover
8Proto-Indo-European(s)teg-to cover; pole, stick, beam

via Dutch twee

StepLanguageWordMeaning
1Dutchtweetwo
2Middle Dutchtwêetwo
3Old Dutchtwē
4Proto-Germanictwaitwo
5Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European (s)teg-Every word from Proto-Germanic þakąEvery word from Proto-Germanic þakjaną
tweedekker — Etymology, Origin & Word History | Etymology Explorer