1. 永远的：eon 永世 | eonian 永远的 | eonism 粉癖

2. 永远的/永久的：eon /永世/无数的年代/ | eonian /永远的/永久的/ | eonism /易装癖/

adj

1. continuing forever or indefinitely

e.g. the ageless themes of love and revenge
eternal truths
life everlasting
hell's perpetual fires
the unending bliss of heaven

Synonym: agelessaeonianeternaleverlastingperpetualunendingunceasing

2. of or relating to a geological eon (longer than an era)

Synonym: aeonian