What is "lightens"

Usage examples of "lightens".

Advice helps only him who gives it, and that only insofar as it lightens the burdens of conscience.

Then one evening, unexpectedly, the sky lightens and the surface wind falls off, although high altitude streams continue to rush cloud layers overhead, tugging them apart into wisps.

Outside, the sun shines brightly, although there is a slight haze that lightens the green-blue sky.

If I don’t know what that was, Kimmer, you’ll be the first thing that lightens this gig’s load.