profound, deep-water, broad, wide, thick, large, intense, heavy, big, oceanic abyss, more...

shallow, superficial, surface, slight, cursory

abyssal, hadal, benthic, pelagic, mesopelagic, bathyal, abyssopelagic, epipelagic, more...

great, above, skin, waist, mighty, unknown, norwegian, knee, frozen, amorous, infinite

most profound,   more profound,   not superficial,   to the bone,   low in pitch,   not shallow,   having depth,   somewhat profound,   not as superficial,   with depth,   deeper down