"ulterior" in the adjective sense
1. 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
2. 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
3. later, ulterior, posterior
coming at a subsequent time or stage
"without ulterior argument"
"the mood posterior to"
Source: WordNet® (An amazing lexical database of English)
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