Forever

aina

((colloquially) constantly or frequently)

ikiajoiksi

(for all time, for all eternity; for an infinite amount of time)

ikuisesti

(for all time, for all eternity; for an infinite amount of time)

ikuisuuden

((colloquially) for a very long time)

ikuisuuden

((colloquially) for an excessively long time)

ikuisuus

(extremely long time)

iäisyys

(mythical time in the infinite future)