This is the 680th most frequent German word.
du
"You" (informal, singular).
In this sentence, 'du' is used as the subject pronoun to address someone informally in the singular form, often used among friends or family members.
Du bist sehr freundlich.
You are very kind.
Here, 'du' is the subject implying the listener being directly addressed in an informal context, part of a question.
Was denkst du über den Film?
What do you think about the movie?
'Du' in this sentence is used to refer to the individual being spoken to, emphasizing the informal and direct interaction.