deeply

As adverbs the difference between deeply and closely

is that deeply is at depth, in a deep way while closely is in a close manner.

As adverbs the difference between deeply and deeply

is that deeply is at depth, in a deep way while deeply is at depth, in a deep way.

As adverbs the difference between thickly and deeply

is that thickly is in a thick manner while deeply is at depth, in a deep way.

As adverbs the difference between deeply and fully

is that deeply is at depth, in a deep way while fully is in a full manner; without lack or defect.

As an adverb deeply

is at depth, in a deep way.

As an adjective deeper is

comparative of deep.

As adverbs the difference between severely and deeply

is that severely is in a severe manner while deeply is at depth, in a deep way.

As adverbs the difference between deeply and gravely

is that deeply is at depth, in a deep way while gravely is in a grave or serious manner.

As an adjective gravely is

characterised by gravel, pebbles, or small stones.

As an adverb deeply

is at depth, in a deep way.

As a verb deepen is

to make deep or deeper.

As adverbs the difference between concisely and deeply

is that concisely is in a concise manner, briefly, without excessive length while deeply is at depth, in a deep way.

As adverbs the difference between underneath and deeply

is that underneath is below; in a place beneath while deeply is at depth, in a deep way.

As a preposition underneath

is under, below, beneath.

As an adjective underneath

is under, lower.

As a noun underneath

is the part under or lower.