(每日一词）oracle

oracle  /ˈɔːr.ə.kəl/ n. （尤指古希腊的）女祭司；神谕; 行家，专家

meaning: (especially in ancient Greece) a female priest who gave people wise but often mysterious advice from a god, or the advice given （尤指古希腊的）女祭司；神谕; 

Meaning: someone who knows a lot about a subject and can give good advice 行家，专家

1) 词根: ora- 说话

2) 后缀：-acle 同-icle 名词后缀，（article） 

e.g. Professor Rose is regarded as the oracle on eating disorders. 罗斯教授被视为研究进食障碍方面的专家。