outlandish

1. ADJ If you describe something as outlandish, you disapprove of it or find it funny because you think it is very unusual, strange, or unreasonable. 稀奇古怪的[表不滿]

This idea is not as outlandish as it sounds. 這主意聽上去荒誕不經(jīng)，事實上卻并非如此。