His scepticism made him doubt the validity of the new scientific discovery.

scepticism 是名词，来自形容词 sceptic（怀疑的）加上后缀 -ism（表示主义、态度）。sceptic 源自希腊语 skeptikos，意思是"思考的、质疑的"。 scepticism 指"怀疑态度"或"怀疑主义"，表示对事物真实性或正确性持保留意见的倾向。