endlessly
Definitions
Having no limit or end; continuing forever.
Constantly recurring; persistent or incessant.
Examples
The two friends talked endlessly about their plans for the upcoming summer vacation.
She stared endlessly at the horizon, waiting for the ship to appear in the distance.
Synonyms
ceaselessly perpetually incessantly constantly eternally continuously persistently
Antonyms
briefly momentarily temporarily transiently fleetingly occasionally intermittently