Furtive
Sneaky and secretive, sly
Flagrant
Noticeably bad, offensive
Latent
Present or capable of coming into existence, but not visible.
Ostensible
Apparent, seemingly true on the surface
Salient
Strikingly conspicuous, significant
Sequester
To isolate someone or something
To seize or gain possession of property
Subterfuge
A deceptive trick
Surreptitious
done, or made by secret or stealthy means
Unobtrusively
Acting in a manner that does not attract attention
Vaunt
To boast or brag about
A boastful remark