Obscure
Part of speech: verb
Definition: To darken, make faint etc. To hide, put out of sight etc.
Part of speech: adjective
Definition: Dark, faint or indistinct. Hidden, out of sight or inconspicuous, Difficult to understand.
Example sentence: Nothing is more unreliable than the populace, nothing more obscure than human intentions, nothing more deceptive than the whole electoral system.
Concealed
Part of speech: verb
Definition: To hide something from view or from public knowledge, to try to keep something secret.
Example sentence: Passion must be concealed in a society where cold reserve and indifference are the signs of good breeding.