diphthong
                
          英 ['d?fθ??; 'd?p-]
美 ['d?fθɑ?]
        
                
        
                
                助記提示
        
        1. phon- => phthong- "sound, voice" => diphthong.
                中文詞源
        
        diphthong 二合元音來自希臘語diphthongos, di-, 二,-phthongos, 聲音,詞源不詳,可能同phone. 用來指二合元音。
 
                英文詞源
        
        - diphthong (n.)
- late 15c., from Middle French diphthongue, from Late Latin diphthongus, from Greek diphthongos "having two sounds," from di- "double" (see di- (1)) + phthongos "sound, voice," related to phthengesthai "utter, speak loudly."