Presumed without analysis.
Self-evident, intuitively obvious.
Based on hypothesis and theory rather than experiment or empirical evidence.
Developed entirely from scratch, without deriving it from existing languages.
In a way based on theoretical deduction rather than empirical observation.
existing outside time; as opposed to sempiternal, existing within time but everlastingly
Lasting forever; unending.
Constant; perpetual; ceaseless; ever-present.
One who lives forever; an immortal.