口 - Wiktionary, the free dictionary Pictogram (象形) – resembles an open mouth In the oracle bone script, radical 口 is used for characters having abstract meanings
Radical 30 - Wikipedia In the Kangxi Dictionary, there are 1,146 characters (out of 40,000) to be found under this radical 口 is also the 37th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China