The politician's two-faced approach made it difficult for voters to determine his true stance.

two-faced 是由 two（二）和 faced（脸）组成的复合形容词。two 表示"两个"，faced 来自名词 face（脸）加后缀 -ed 变成形容词，表示"有...脸的"。 two-faced 字面意思是"有两张脸的"，引申为"两面派的、虚伪的"，形容一个人在不同场合表现出完全不同的态度或立场。