hidden
1 Hidden is the past participle of hide.
2 adj Hidden facts, feelings, activities, or problems are not easy to notice or discover.
Under all the innocent fun, there are hidden dangers, especially for children...
3 adj A hidden place is difficult to find. As you descend, suddenly you see at last the hidden waterfall.
hidden agenda (hidden agendas plural )If you say that someone has a hidden agenda, you are criticizing them because you think they are secretly trying to achieve or cause a particular thing, while they appear to be doing something else. n-count
(disapproval)
He accused foreign nations of having a hidden agenda to harm French influence...