| 单词 | serene | 
| 释义 | Word Frequency serene(sɪˈriːn) adjective 1.  peaceful or tranquil; calm  2.  clear or bright   a serene sky 3. (often capital)  honoured: used as part of certain royal titles  His Serene Highness Derived formsserenely (seˈrenely) adverb sereneness (seˈreneness)  noun Word originC16: from Latin serēnus | 
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