Eccentric
weird, peculiar
Elusive
out of reach, hard to catch, evasive
Eminent
outstanding, illustrious, very prominent, notable
Exorbitant
unreasonable, very high ("exorbitant prices")
Expound
to elaborate, to explain in great detail
Extricate
to get out of an entanglement or difficulty
Extrovert
an outgoing personality
Amorphous
without shape
Anarchy
without rule, having no government
Anomaly
an exception to the rule, not following the norm
Atheist
person who does not believe in god
Redundant
to repeat something over and over; repetitive
Refurbish
to make new again, renovate
Rejuvenate
to feel young again
Repatriate
to return to one's country of origin
Resilient
to bounce back from adversity of change
Revitalize
to regain energy
Revoke
to take back
Immutable
not changing
Impartial
unbiased, treating all equally
Impious
lacking reverence, disrespective
Inauspicious
not favorable
Incorporeal
without material form or substance
Incorrigible
incapable of being reformed
Indefatigable
incapable of being fatigued, having great stamina
Insatiable
incapable of being satisfied
Intrepid
having no fear, dauntless
Inviolable
secure and thus cannot be violated
Unfazed, Unflappable
calm, not disturbed; not easily disturbed, calm
Unfettered
free from restraints, liberated
Unfounded
groundless, without substance, false
Unorthodox
not following established ways of thinking
Unparalleled
having no parallel, hence unequaled
Unremitting
unrelieved, relentless, ceaseless
Unscathed
unhurt, unharmed
Unsubstantiated
not proving