How do you say "château" in French?

‘Chateau, chateaux’ *(m) is French for ‘castle’, or ‘palace’. In wine-making, and particularly in Bordeaux, ‘châteaux’ simply means a ‘wine-making estate’.

You will often see the words ‘mise en bouteille au château’ on a bottle of French wine. This means ‘wine bottled on the Estate’.

The singular and the plural, château, châteaux, are pronounced identically in French. The circumflex accent on the ‘â’ does not affect pronunciation in any way – it indicates that historically the ‘a’ was followed by an ‘s’ which has since disappeared from the spelling.