哪知道
nǎ zhīdào · HSK 7
Where to know
🤷 哪 (where/which) + 知道 (to know) = how was I to know, who knew
哪 means where or which; 知道 means to know. Together it is a rhetorical how was I to know — used like who knew that would happen. The literal where-know signals surprise that nobody could have predicted the outcome.
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.
道 — 辶 (walk) + 首 (head)
Originally a compound of 辶 'walk/movement' and 首 'head', depicting a path one walks while looking ahead. The literal sense 'road, way' extended metaphorically to 'method, doctrine, the Way (Dao)'. This philosophical meaning became central in Daoist and Confucian thought.