subtonicWiktionary 原文英美构词拆解subsub-前缀tonictonic词干sub-Under, beneath. · Subsidiary, secondary.词源说明From sub- + tonic.释义形容词adjective1(phonetics, dated) Of or pertaining to imperfectly articulated sounds or utterances that are inaudible or barely audible, as characterized by Dr. James Rush (Guide to Pronunciation, 1833).名词noun1(music) The note immediately below the upper note of a