perpetual
adjective/pɨɾˈpɛtwu/medium
per·pé·tuo
Definition
Lasting forever or for an indefinitely long time; eternal, continuous.
The search for knowledge is a perpetual task.
They established a perpetual flame in memory of the deceased.
Common collocations
perpetual motionperpetual flameperpetual imprisonment
Etymology
Do latim 'perpetuus'.