At bottom, At the bottom, at the foundation or basis; in reality. "He was at the bottom a good man." J. F. Cooper. -- To be at the bottom of, to be the cause or originator of; to be the source of. [Usually in an opprobrious sense.] J. H. Newman.
He was at the bottom of many excellent counsels.
Addison.
-- To go to the bottom, to sink; esp. to be wrecked. -- To touch bottom, to reach the lowest point; to find something on which to rest.
Bot"tom, a. Of or pertaining to the bottom; fundamental; lowest; under; as, bottom rock; the bottom board of a wagon box; bottom prices.
Bottom glade, a low glade or open place; a valley; a dale. Milton.
-- Bottom grass, grass growing on bottom lands. -- Bottom land. See 1st Bottom, n., 7.