This is the 264th most frequent German word.
zu
The German word "zu" means "to," "too," or "closed," depending on context.
The word 'zu' here indicates direction towards a person or place, similar to 'to' in English.
Ich gehe zu dir nach Hause.
I am going to your house.
The word 'zu' here is used as a comparative emphasis, meaning 'too' in English, and also as a marker for the infinitive 'zu passen'.
Das Geschenk ist zu groß, um in den Karton zu passen.
The gift is too big to fit into the box.
The word 'zu' here is part of the infinitive construction 'zu wissen', functioning as a marker for the infinitive verb 'wissen'.