Learn French: Ils sont chez eux maintenant. - They are at home at their place now.

Chez is a preposition (a word that shows location or relationship, like "at" or "with"). In French, whenever a pronoun comes directly after a preposition, you must use a stressed pronoun (like moi, toi, lui, eux) rather than a subject pronoun like ils. So, "at their place" is chez eux, never chez ils.

Does chez eux always mean "at home"?

It means "at their place" or "at their home". The word chez translates loosely to "at the house of" or "at the place of". By combining chez with the stressed pronoun eux (them), you get "at their house". If you wanted to say "at my house", you would use the stressed pronoun for "me" and say chez moi.

What if the group of people we are talking about is all women?

If you are talking about an all-female group, the subject pronoun changes to elles (they, feminine) and the stressed pronoun also changes to elles. The sentence would become: Elles sont chez elles maintenant. You only use ils and eux for an all-male or a mixed-gender group.

How do I pronounce chez eux? Is the 'x' silent?