deepness
[noun]
Synonyms: depth, drop, abyss, profoundness, profundity

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Antonyms: shallowness

[TahlilGaran] English Synonym Dictionary ▲

deepness noun. ['di:pnɪs] Now rare. OE.
[from DEEP adjective + -NESS. Largely superseded by DEPTH.]
1. Depth of thoughts, feelings, qualities, etc.; profundity, intensity, seriousness. OE.

2. A deep place; a deep part of the sea. OE-M16.

3. Physical depth; (considerable) extension downwards, inwards, or from front to back. ME.

[TahlilGaran] English Dictionary ▲