Final answer:
The word "versteht" in the sentence means "to understand".
Step-by-step explanation:
The underlined word "versteht" in the sentence "der Arzt versteht, daß mein Kopf weh tut" means "to understand" in English.
In this sentence, "der Arzt" means "the doctor", "daß" means "that", "mein Kopf" means "my head", and "weh tun" means "hurts". Therefore, the sentence translates to "The doctor understands that my head hurts."
So in this context, the word "versteht" is conveying the meaning of understanding.