Heat a large skillet over high heat, then brown the roast for about 4 minutes per side.
Place roast in slow cooker; add soup mix and water. Cover and cook on low for 8 to 10 hours or until roast is no longer pink.
About 3 hours before roast is done, peel and chop the carrots, onion, potatoes, and celery; add to the crockpot. (Veggies can be added sooner but they will be a bit mushy.)