Where does “two-tiered” come from?

two-tiered (English) 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.

two-tiered (English): Having two tiers

Definitions

  1. Having two tiers

Ancestry of “two-tiered”, step by step

two-tiered traces back through two separate lines of ancestry.

via English two

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

via English tiered

StepLanguageWordMeaning
1Englishtieredsimple past tense and past participle of tier;...
Every word from Proto-Indo-European dwóh₁Every word from Proto-Germanic twaiEvery word from Proto-West Germanic twai-