adv. - At or to a great depth; far below the surface; as, to sink deeply.
adv. - Profoundly; thoroughly; not superficially; in a high degree; intensely; as, deeply skilled in ethics.
adv. - Very; with a tendency to darkness of color.
adv. - Gravely; with low or deep tone; as, a deeply toned instrument.
adv. - With profound skill; with art or intricacy; as, a deeply laid plot or intrigue.