Where does “ツー” come from?

ツー (Japanese) comes from English two, from Middle English two, from Old English twā, from Old English twēġen, from Proto-West Germanic twai-, from Proto-Germanic twai, from Proto-Indo-European dwóh₁ — two.

ツー (Japanese): two; dah of Morse code

Definitions

  1. two; dah of Morse code

Ancestry of “ツー”, step by step

StepLanguageWordMeaning
1EnglishtwoA numerical value equal to 2; this many dots;...
2Middle Englishtwotwo
3Old Englishtwātwo
4Old Englishtwēġentwo; twain
5Proto-West Germanictwai-two
6Proto-Germanictwaitwo
7Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Germanic twai →Every word from Proto-West Germanic twai- →