Simile

A figure of speech that makes a comparison between two unlike things and uses the words "like," "as," "than," or "resembles."

Example From Text

Driving snow, a wind that cut like a whitehot knife, and darkness had forced them to grope for a camping place.

Explanation

Here, London comapres the wind with a "whitehot knife." The wind is so strong that it feels like it's cutting into them.