without beginning or end; lasting forever; always existing ( opposed to temporal )

eternal life.

perpetual; ceaseless; endless

eternal quarreling; eternal chatter.

enduring; immutable

eternal principles.

Metaphysics . existing outside all relations of time; not subject to change.

something that is eternal.

the Eternal, God.

adverb

briefly , changeably , temporarily , transiently

adverb

always , continually , ever , evermore , forever , forevermore , for ever so long , for keeps , in perpetuum , perpetually , regularly , till cows come home