penetrating or entering deeply into subjects of thought or knowledge; having deep insight or understanding

a profound thinker.

originating in or penetrating to the depths of one's being; profound grief.

being or going far beneath what is superficial, external, or obvious

profound insight.

of deep meaning; of great and broadly inclusive significance

a profound book.

pervasive or intense; thorough; complete

a profound silence.

extending, situated, or originating far down, or far beneath the surface

the profound depths of the ocean.

low

a profound bow.

deep.

something that is profound.

the deep sea; ocean.

depth; abyss.