liken

Reader's Digest 12/1月合併号の記事 'What A Waste!' からの引用です。

Where. then, is the tipping point beyond which our debt level will become unsustainable? No one knows. But, says Maya MacGuiness, "I liken it to invisible fence--you have no idea where it is, but you don't want to find out."

"liken" は基本語の "like" と似ていますが、関係があるのでしょうか？　辞書を見ます。
・Oxford English Dictionary: Point out the resemblance of someone or something to.: ‘they likened the reigning emperor to a god’

・Collins Dictionary: If you liken one thing or person to another thing or person, you say that they are similar.: He once likened his job to fire-fighting.

・Cambridge English Dictionary: to say that someone is similar to or has the same qualities as someone else: She's been likened to a young Elizabeth Taylor.

"darken" や "weaken" のように名詞や形容詞を動詞にする 'en' が "like" についてできた動詞ですね。