deeply

As a noun bottom

is the lowest part from the uppermost part, in either of these senses:.

As a verb bottom

is to fall to the lowest point.

As an adjective bottom

is the lowest or last place or position.

As an adverb deeply is

at depth, in a deep way.

As adverbs the difference between deeply and groundly

is that deeply is at depth, in a deep way while groundly is (rare|archaic) to the very ground, to the very bottom; thoroughly, completely; solidly; deeply; profoundly.

As an adjective groundly is

(rare|archaic) thorough, complete; solid; deep; profound.