| 词汇 | tonic |
| 词根词缀 | 词源： tonic (adj.) 1649, "relating to or characterized by muscular tension," from Gk. tonikos "of stretching," from tonos "a stretching" (see tenet). The meaning "maintaining the healthy firmness of tissues" is recorded from 1684, first extended 1756 to "having the property of restoring to health." The noun meaning "a tonic medicine" is attested from 1799. The musical sense is first attested 1760, from tone (q.v.). |
| 随便看 |
英语词根词缀词典收录了31503条英语词根词缀词条，基本涵盖了全部常用英语词汇的词根、词缀及词根记忆法解析，是记忆英语词汇的必备工具。