tonelessWiktionary 原文英美构词拆解tonetone词干less-less后缀-lessLacking (something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun.词源说明From tone + -less.释义形容词adjective1Lacking tone or expression.2Lacking vitality; listless; lifeless.3(linguistics) Lacking tone or pitch, have the neutral tone.同族词派生词 2tonelessness·