形容詞 ulterior:

1. lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)- Bertrand Russell
   同義詞：subterranean, subterraneous
2. beyond or outside an area of immediate interest; remote- G.B.Shaw
3. coming at a subsequent time or stage
   同義詞：future, later

1. This lever must serve some ulterior purpose.
   這撬棒準是用於不可告人的目的的。
2. Jim had ulterior motives in buying me a drink he wants to borrow my van.
   吉姆請我喝酒是另有所圖--他想借用我的客貨車。