This is the 13147th most frequent German word.
anhaben
To have on (wear clothing).
The verb 'anhaben' is used to describe wearing clothes, with 'rotes Hemd' being the item worn.
Er hat heute ein rotes Hemd an.
He is wearing a red shirt today.
Here, 'anhaben' is inquired to find out someone's attire, emphasizing the action of wearing.
Was hast du an dieser kalten Wintertag an?
What are you wearing on this cold winter day?
The use of 'anhaben' here highlights personal style and attire choices, showcasing the action of wearing.