Adjective

• S: (adj) subterranean, subterraneous, ulterior (lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)) "subterranean motives for murder"; "looked too closely for an ulterior purpose in all knowledge"- Bertrand Russell
• S: (adj) ulterior (beyond or outside an area of immediate interest; remote) "a suggestion ulterior to the present discussion"; "without...any purpose, immediate or ulterior"- G.B.Shaw
• S: (adj) later, ulterior, posterior (coming at a subsequent time or stage) "without ulterior argument"; "the mood posterior to"