prepared

Prepared, a.

Made fit or suitable; adapted; ready; as, prepared food; prepared questions. -- Pre*par"ed*ly, adv. Shak. -- Pre*par"ed*ness, n.

Shades of meaning

Fernald has no entry of its own for prepared; he lists it under alert.

Where he writes about it:

Ready expresses more life and vigor than prepared. — from alert

The gun is prepared; the man is ready. — from alert