perpetuity (adj) – an indefinitely long duration; eternity
BREAKDOWN: PER- (thoroughly) + PET- (strive) + -ITY (quality of)
— to perpetuate is to prolong the duration or existence of
— perpetual means continuing or lasting for an indefinitely long time or forever; uninterrupted
This word is built on the root PET-, which means to seek, ask, or strive.
Common PET- words include appetite, competent, competition, petition, and repeat.
More esoteric PET- words include appetent and petulance.