Beijing (a direct-administered municipality, the capital city of China)
Borrowed from Mandarin 北京 (Běijīng), specifically the Nanking court dialect from before the modern palatalization of [k] to [t͡ɕ]. Doublet of Beijing. Compare Spanish Pekín, French Pékin, English Peking, Dutch Peking.
Practice speaking and memorizing "Pequim" and many other words and sentences in Portuguese.