The word 阿曼 is formed through a direct phonetic borrowing from the foreign name "Oman". It uses two existing Chinese characters, 阿 (ā) and 曼 (màn), chosen solely for how closely their combined pronunciation approximates the sound of the English name. This is a standard method in Chinese for transcribing foreign proper nouns, particularly country names, where the characters serve as sound symbols without carrying their original meanings into the new word.