Synonyms of deep in English:

deep


See definition of deep

adjective

1‘a deep ravine’

SYNONYMS
extending far down
cavernous, yawning, gaping, huge, big, great, extensive, profound, unplumbed
bottomless, immeasurable, fathomless, unfathomable
rare chasmic
ANTONYMS

shallow

2‘a deep shelf’

SYNONYMS
extending far back, extending far in, extending a long way back, extensive
ANTONYMS

shallow

3‘a puddle about two inches deep’

SYNONYMS
in depth, downwards, inwards, from top to bottom, from the surface, in vertical extent

4‘I have a deep affection for you’

SYNONYMS
intense, heartfelt, deeply felt, fervent, ardent, impassioned, wholehearted, deep-seated, deep-rooted, thorough, thoroughgoing, serious
sincere, honest, genuine, unfeigned
earnest, enthusiastic, keen, great
grave, abject
ANTONYMS

superficial, insincere

5‘Laura drifted into a deep sleep’

SYNONYMS
sound, heavy, profound, intense

6‘Helen was a deep thinker’

SYNONYMS
clever, intelligent, intellectual
knowledgeable, learned, wise, sagacious, sage, scholarly
discerning, penetrating, perspicacious, perceptive, percipient, insightful, keen, sharp, sharp-witted, quick-witted
profound, philosophical, complex, weighty, serious, difficult, abstruse, esoteric, recondite, impenetrable, unfathomable, mysterious, obscure
ANTONYMS

straightforward

7‘he was deep in concentration’

SYNONYMS
rapt, absorbed, engrossed, preoccupied, immersed, steeped, lost, captivated, spellbound, riveted, gripped, enthralled, intent, engaged

8‘a deep mystery’

SYNONYMS
obscure, mysterious, hidden, secret, unfathomable, fathomless, opaque, abstruse, recondite, esoteric, enigmatic, arcane, Delphic
puzzling, perplexing, baffling, mystifying, inexplicable
informal as clear as mud

9‘his deep voice’

SYNONYMS
low-pitched, low, bass, full-toned, rich, powerful, resonant, rumbling, booming, resounding, sonorous
ANTONYMS

high

10‘a deep reddish-brown colour’

SYNONYMS
dark
intense, vivid, rich, strong, brilliant, glowing, vibrant, bold, warm, flamboyant, eye-catching
ANTONYMS

light, thin


noun

1the deep‘the strange creatures of the deep’

SYNONYMS
the sea, the ocean
the high seas
informal the drink, the briny
literary the waves, the main, the foam, the profound

2the deep‘in the deep of night’

SYNONYMS
the middle, the midst, the mid point, the central point
the depths, the thick, the dead, the heart, the kernel, the interior

adverb

1‘I dug deep’

SYNONYMS
far down, far in, deep down, way down, to a great depth

2‘he brought them deep into thick woodland’

SYNONYMS
far, a long way, a great distance, a good way