diphthongal
/dɪf'θɒŋɡl/ /dɪf'θɔːŋɡl/
adj. 
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coupla, couplant, couple, couple-close, coupled, coupledom, coupler, couplers, couples, couplet,
相似单词
diphtheriolysin, diphtheritic, diphtheritis, diphtheroid, diphthong, diphthongal, diphthongia, diphthongise, diphthongization, diphthongize,