Not known; unidentified; not well known.
A variable (usually x, y or z) whose value is to be found.
A person of no identity; a nonentity
Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
Ancient, antiquated or archaic.
Giving an impression of aged goodness and benevolence.
Commanding respect because of age, dignity, character or position.
Made sacred especially by religious or historical association.
Worthy of reverence.