哪儿
nǎér · HSK 1
where
📍❓ 哪 = mouth 口 + that 那; 儿 is northern -r suffix meaning 'where'
哪 asks 'which' by pairing 口 (mouth, for speaking) with 那 (that). Adding 儿 erhua turns 哪 into 哪儿, the Beijing-style word for 'where'. Southern speakers say 哪里 instead.
哪 — mouth 口 + that 那
A phono-semantic compound. The mouth radical 口 signals a spoken word or question particle, while 那 (nà, 'that') supplies the sound. Originally a variant of 那, it later specialized as the interrogative 'which?' in Mandarin.