Learn English – Single adjective meaning “for a long time”

single-word-requestsword-choice

Basically I want to say:

Sheep grazing is one of the possible ways to restore the biodiversity
of alpine meadows that have been uncultivated for a long time.

But I would like to form much nicer and simpler sentence. I would imagine something like this:

Sheep grazing is one of the possible ways to restore the biodiversity
of [THAT WORD] uncultivated alpine meadows.

So I am looking for a single word that would beam "for a long time" which could be placed there to make the sentence more fluent 🙂

The only thing I can think of is "longly" but this sounds suspicious to me 🙂

Best Answer

long itself works perfectly fine as an adverb

For a long time:

his long-awaited Grand Prix debut

long-uncultivated alpine meadows, though it sounds a bit unusual, should do it.