How do you say the word their in German?

Answer 1

When the pronoun is conected to a singular noun then the Geman word is ihr (for male and neuter nouns) or ihre (for female nouns) -

das ist ihr Haus - that's their house

das ist ihre Schwester - that's their sister

When the pronoun is conected to a plural noun then the Geman word is ihre -

Das sind ihre Autos - those are their cars

Depending on the case (dative, accusative, nominative or genitive), ihr can become ihren, ihremor ihres, and ihre can become ihrer