Fainter

The noise grew fainter, until it wasn't heard anymore.

The sound became fainter and fainter, until at last it disappeared.

The sound grew fainter and fainter.

Her consciousness grew fainter as death approached.

Hubble can detect objects as faint as 31st magnitude, which is about 10 billion times fainter than the human eye can see.

As an adult and the wife of the minister, I was always armed with vials of smelling salts, furnished by funeral directors, for fainters at church funerals.