deep

Of an obscure nature.

“a deep dark secret”

Extending relatively far inward.

“a deep border”

Having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination.

“a deep well”

“a deep dive”

Intense or extreme.

“in deep trouble”

“deep happiness”

Large in quantity or size.

“deep cuts in the budget”

Marked by depth of thinking.

“deep thoughts”

“a deep allegory”

Relatively deep or strong; affecting one deeply.

“a deep breath”

“a deep sigh”

Relatively thick from top to bottom.

“deep carpets”

“deep snow”

Very distant in time or space.

“deep in the past”

“deep in enemy territory”

(of darkness) densely dark.

“a face in deep shadow”

“deep night”

With head or back bent low.

“a deep bow”

Difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge.

“a deep metaphysical theory”

Strong; intense.

“deep purple”

Having or denoting a low vocal or instrumental range.

“a deep voice”

Exhibiting great cunning usually with secrecy.

“deep political machinations”

“a deep plot”

Literary term for an ocean.

“denizens of the deep”

The central and most intense or profound part.

“in the deep of night”

“in the deep of winter”

A long steep-sided depression in the ocean floor.

To a great distance.

“penetrated deep into enemy territory”

“went deep into the woods”

To an advanced time.

“deep into the night”

To a great depth; far down or in.

“dived deeply”

“dug deep”