whom به انگلیسی

From Longman Dictionary

whom /huːm/ ●●● W1 pronoun
the object form of ‘who’, used especially in formal speech or writing
شکل مفعولی “who” که به ویژه در گفتار یا نوشتار رسمی استفاده می شود
Example
Desperate for money, she called her sister, whom she hadn’t spoken to in 20 years
She brought with her three friends, none of whom I had ever met before
I spent two hours talking to Kaz, whom I’d met only once before
She had three lovers, none of whom knew about the others