two-year-old russian

• двухле́тний

  of two years, two-year, biennial, of two, two-year-old

• двухгодова́лый

  two-year, two-year-old

Examples

• Мой двухлетка не всё хо́чет есть из поле́зной еды́, кото́рую я ему стара́юсь дава́ть.My two-year-old won't eat some of the healthy food I've been trying to feed him.