Possible as opposed to actual; having or showing the capacity to develop into something in the future; latent; prospective.

Of a quality, force, phenomenon, etc.: hidden, concealed (occasionally with from); present or existing, but not manifest, exhibited, or developed…

(un-, prefix1 affix 1.)

Characterized by or of the nature of ‘surreption’; stealthily suggested to or introduced into the mind.

Not manifest or evident; invisible, hidden.

(un-, prefix1 affix 1.)

Unapparent.

Not manifested or made evident; invisible, hidden.

Not evident, not manifest; lacking evidence; not clear or obvious, obscure.

Not apparent or manifest; invisible; latent.

Not obvious.

Not manifest or evident.

That lies concealed or hid; lurking; latent; (of an animal) hibernating.

Potential.

Virtually or potentially contained in.

Something that is not apparent. Obsolete.

Involved; entangled; intricate; †hidden, obscure (obsolete).

Not brought to light; not shown up.

Not ostensible; unseen, invisible; inconspicuous.