哪儿

Why does 哪儿 look like this?

This word is a combination of two characters: '哪' (nǎ), which combines '口' (mouth/speech) with '那' (that/which) to indicate a question, and '儿' (ér), the radical for 'son/child' used here as a suffix for the 'erhua' sound common in Northern Chinese dialects. Together, they literally mean 'which place'.