Radical ⾳ (180)

{音} *[q](r)əm “sound” & {言} *ŋa[n] “speak”

言 + differentiative dot. Initially it was used for both words {音} and {言}. Later it began to be used only for {音}.

• 季旭昇 2014 - 說文新證 [2nd ed.] (164-165)