Neverending

His life is a neverending race against time.

Learning vocabulary is a neverending struggle.

This vial contains a liquid-like substance that cures silence when drunk. If you put it to your ear, you can hear a neverending tune.

It's neverending.

Lulling music washed around me, soft voices announced the rising and falling of airliners, huge screens clicked soothingly through neverending arrivals and departures.