Eternal

An age, a vital force, lifetime

Root of Latin 'aevum' (age), Greek 'aiōn' (age/eon), English 'ever.' Eternity as unending vital force

Perpetuity, forever, hidden time

Can mean both 'forever' and 'the world/age.' 'The eternal God is your refuge' (Deuteronomy 33:27)

Of the age, pertaining to an age, eternal

From aiōn (age/eon). 'This is eternal life, that they know you, the only true God' (John 17:3)

The Everlasting, the Eternal

As-Samad (The Eternal, Self-Sufficient) is in Quran 112:2. Jannah is described as eternal — 'khalidina fiha abada'