adjective

deep

deep, profound, intense

The lake is very deep.

The lake is very deep.

She has a deep voice.

She has a deep voice.

He is in a deep sleep.

He is in a deep sleep.

The colour is a deep red.

The color is a deep red.

((...)) deep + noun The deep ocean is mysterious.

((be)) ((...)) to be deep The water is deep here.

Synonyms: profound, low; Antonyms: shallow, superficial

From Old English 'dēop', meaning 'deep'. It has Germanic origins.

Think of a 'deep' sea for physical depth and a 'deep' thought for abstract depth.

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