Recalcitrant

resistant; defiant of authority

Cogent

convincing; valid; forcibly appealing to the mind

Affluence

profusions; overflowing of wealth; an abundance

Astute

clever; shrewd; intellectually observant

Vindictive

revengeful; spiteful; wanting to hurt or harm

Catharsis

purification; cleansing of emotions

Insatiable

quenchless; incapable of being satisfied

Perpetual

everlasting; continuing forever

Vestige

remnant; that which is left

Clandestine

secretive; held or conducted secretly