sheer

孩子的脸上洋溢着纯粹的喜悦。

The child's face lit up with ___sheer delight.

由于坡度陡峭，攀登很困难。

The ascent was difficult due to the ___sheer slope.

悬崖有一个陡峭的崖面，令人望而生畏。

The cliff has a ___sheer face that is intimidating.