deep
adjective
°(of a hole water ravine cut etc) Having its bottom far down.
°Profound, having great meaning or import, but possibly obscure or not obvious.
verb
°deeply.
noun
°(literary with "the") (meaning 1 above) part of a lake, sea, etc.
°The deep (meaning 2 above) part of a problem.
synonyms: heavy, meaningful, profound, thick more» , great, large, voluminous, low, low-pitched, bright, rich, vivid