Radical 149 or radical speech meaning "speech" is one of the 20 Kangxi radicals composed of 7 strokes.
In the Kangxi Dictionary, there are 861 characters to be found under this radical. Wikipedia
Cantonese Yale: yìhn
Japanese Kana: ゲン gen / ゴン gon (on'yomi); い-う i-u / こと koto (kun'yomi)
