This is the 830th most frequent Czech word.
manželkou
The Czech word "manželkou" means "wife" in English (instrumental case).
Here 'manželkou' is in the instrumental case, indicating the means or companionship in the conversation.
Mluvil jsem se svou manželkou o společné dovolené.
I spoke with my wife about a shared vacation.
In this sentence, 'manželkou' again appears in the instrumental case, denoting companionship.
Šel na večírek se svou manželkou.
He went to the party with his wife.
'Manželkou' in this example is also in the instrumental case of 'manželka,' indicating interaction with the person mentioned.