Dict: strongs - eternity

Strongs:

H5703 @ עד ‛ad ad From H5710; properly a (peremptory) {terminus} that {is} (by implication) {duration} in the sense of perpetuity (substantially as a {noun} either with or without a preposition): - {eternity} ever ({-lasting} {-more}) {old} {perpetually} + world without end.

H5769 @ עלם עולם ‛ôlâm ‛ôlâm {o-lawm'} o-lawm' From H5956; properly {concealed} that {is} the vanishing point; generally time out of mind (past or {future}) that {is} (practically) eternity; frequentative adverbially (especially with prepositional prefix) always: - always ({-s}) ancient ({time}) any {more} {continuance} {eternal} ({for} [n-]) ever ({-lasting} {-more} of {old}) {lasting} long ({time}) (of) old ({time}) {perpetual} at any {time} (beginning of the) world (+ without end). Compare {H5331} H5703.

G3772 @ οὐρανός ouranos oo-ran-os' Perhaps from the same as G3735 (through the idea of elevation); the sky; by extension heaven (as the abode of God); by implication happiness power6 eternity; specifically the Gospel (Christianity): - air heaven ([-ly]) sky.