Constant; perpetual; ceaseless; ever-present.
existing outside time; as opposed to sempiternal, existing within time but everlastingly
Lasting forever; unending.
One who lives forever; an immortal.
Continual or successive; unceasing.
Insightful; deep and succinct; incisive.
Intruding inward.
Tending to incite or inflame; incensive.
Intense and active.
Synonym of inessive
Fierce; cruel and aggressive.
Critical and accurate; incisive.
Included.
Durative.