kahdes

kaksi +‎ -s

kahdes

1. (in compounds) second, two (ordinal of "two"; also in the word for 12th and 20th)

   kahdestoista ― twelfth

   kahdeskymmenes ― twentieth

   sadaskahdestoista ― one hundred twelfth

   kolmaskymmeneskahdes ― thirty-second

   kahdessadaskolmaskymmeneskahdes ― two hundred thirty-second

   kahdesmiljoonas ― two millionth

   kahdestuhanneskahdessadas ― two thousand two hundredth

   kaksituhattasadas ― two thousand one hundredth

• Used only in compound numerals, never alone.
• Interchangeable with toinen (“second”) when indicating ones (but not in 12th); toinen is currently more commonly used.

  kolmaskymmeneskahdes; kolmaskymmenestoinen ― thirty-second

• toinen; to indicate ones only, but not in kahdestoista (“twelfth”)

• yhdes (first)