deep

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”

of an obscure nature“the new insurance policy is written without cryptic or mysterious terms”

relatively deep or strong; affecting one deeply“a deep breath”

having or denoting a low vocal or instrumental range“a deep voice”

strong; intense“deep purple”

difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge“the professor's lectures were so abstruse that students tended to avoid them”

extending relatively far inward“a deep border”

(of darkness) densely dark“thick night”

large in quantity or size“deep cuts in the budget”

marked by depth of thinking“deep thoughts”

very distant in time or space“deep in the past”

intense or extreme“in deep trouble”

relatively thick from top to bottom“deep carpets”

with head or back bent low“a deep bow”

exhibiting great cunning usually with secrecy“deep political machinations”

a long steep-sided depression in the ocean floor

the central and most intense or profound part“in the deep of night”

literary term for an ocean“denizens of the deep”

to a great depth; far down or in“dived deeply”

to an advanced time“deep into the night”

to a great distance“penetrated deep into enemy territory”