A preposterous idea, story, or price is completely unreasonable — so silly that it feels the wrong way round. You are not making a small complaint; you are saying common sense has been stood on its head.

A preposterous idea, story, or price一個preposterous(荒謬)的想法、故事，或價格 is completely unreasonable是完全不合理的——so silly that it feels the wrong way round荒唐到讓人覺得整件事顛倒過來了。You你 are not making a small complaint不是在講一個小小的抱怨；you are saying你是在說 common sense has been stood on its head常識被整個顛倒過來了。

That's preposterous! is something an adult might say when a claim is too much to accept. It is stronger and a little more formal than silly, and sharper than strange.

"That's preposterous!"「That's preposterous(這太荒謬了)！」 is something an adult might say是大人可能會說的話，when a claim is too much to accept當某個說法讓人難以接受的時候。It它 is stronger and a little more formal than silly比silly(傻)更強烈、也更正式一點，and sharper than strange也比strange(奇怪)更尖銳。

The Latin pieces are prae, before, and posterus, coming after: the back put in front. That picture still helps — a preposterous plan has its parts in the wrong order.

The Latin pieces拉丁文的組成部分 are prae, before是prae，意思是「在前」，and posterus, coming after還有posterus，意思是「在後面來的」——the back put in front也就是把後面的東西放到前面。That picture這個畫面 still helps還是能幫助理解：a preposterous plan一個preposterous的計畫 has its parts in the wrong order各個部分的順序是顛倒的。

Though actually, people also stretch it just to mean ridiculously high, as in preposterous fees, without any logic puzzle at all.

Though actually不過事實上，people人們 also stretch it也會把這個詞用得更廣，just to mean ridiculously high單純用來表示「高得離譜」，as in preposterous fees像preposterous fees(離譜的費用)，without any logic puzzle at all完全不涉及什麼邏輯顛倒的意思。