deeper

As an adjective deeper

is (deep).

As a verb deepens is

(deepen).

As adjectives the difference between farther and deeper

is that farther is (far) of or pertaining to being distant, or of greater distance in degree or of extension in time while deeper is (deep).

As an adverb farther

is .

As adjectives the difference between shallower and deeper

is that shallower is (shallow) while deeper is (deep).

As adjectives the difference between deeper and undefined

is that deeper is (deep) while undefined is lacking a definition or value.

As adjectives the difference between deeper and critical

is that deeper is (deep) while critical is inclined to find fault or criticize; fastidious; captious; censorious; exacting.

As a noun critical is

a critical value, factor, etc.

As an adverb deeply

is at depth, in a deep way.

As an adjective deeper is

comparative of deep.

As adjectives the difference between deeper and darker

is that deeper is comparative of deep while darker is comparative of dark.

As an adjective deeper

is comparative of deep.

As a noun dipper is

any of various small passerine birds of the genus Cinclus that live near fast-flowing streams and feed along the bottom.

As a proper noun Dipper is

a Chinese constellation located near Sagittarius, one of the 28 lunar mansions and part of the larger Black Turtle.

As adjectives the difference between deeper and further

is that deeper is comparative of deep while further is comparative of far; of or pertaining to being distant, or of greater distance in degree or of extension in time.

As a verb further is

to encourage growth.

As an adverb further is

comparative of far POS=adverb.

As adjectives the difference between deep and deeper

is that deep is Extending far away from a point of reference, especially downwards.deeper is comparative of deep.

As an adverb deep

is deeply.

As a noun deep

is the deep part of a lake, sea, etc.