What does deepness mean?
Deepness is a noun denoting the state or quality of being deep — whether the physical extent to which something reaches downward or inward, the intensity of a color, sound, or flavor, or the profundity of thought and feeling. Though synonymous with the far more common "depth," it carries a distinctly literary flavor: writers reach for "deepness" when they want to evoke atmosphere rather than record measurement, as in the deepness of a forest pool or the deepness of someone's sorrow. It can describe the rich resonance of a voice, the saturated darkness of a hue, or the thoroughness of understanding. Because it is rare outside descriptive writing, using it well signals deliberate stylistic choice rather than casual speech, and it pairs naturally with abstract nouns as readily as with physical ones.
The quality or state of being deep, especially in terms of downward or inward extent.
"The divers were warned about the deepness of the waters off the northern cliffs."
In technical contexts, "depth" is strongly preferred.
Intensity or richness of a quality such as color, sound, or emotion.
"He admired the deepness of the burgundy velvet in the fading light."
Profundity of thought, knowledge, or feeling.
"Her essay revealed a deepness of insight unusual in a first-year student."
"Profoundness" or "profundity" are more common in formal academic writing.
Rarely used; the plural appears only when referring to distinct instances or varieties of deepness, typically in literary or philosophical writing.
"The poem meditates on the different deepnesses of grief."
Despite sounding like the obvious word for it, "deepness" is dramatically outnumbered by "depth" — by hundreds of times in everyday English — making its use an instant literary flourish.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of deepness
Deepness is formed from the Old English adjective "dēop" (deep) combined with the native suffix "-ness," which turns adjectives into abstract nouns denoting a state or quality. The word has existed in English since at least the Middle English period, developing alongside its Germanic relatives — Old High German "tiof" and Old Norse "djúpr" — all descended from Proto-Germanic *deupaz. Unlike many learned Latinate alternatives such as "profundity," deepness remains a fully native English formation.
How deepness is actually used
"Deepness" is considerably less common than "depth" and tends to appear in literary, poetic, or descriptive prose. In technical, scientific, and everyday contexts, "depth" is almost always preferred for measurements. "Deepness" often carries a slightly emotive or atmospheric connotation when describing qualities like voice, color, or emotion.
Easily confused with deepness
"Depth" is the standard, far more common noun for how deep something is, while "deepness" is a rarer, more literary synonym that also emphasizes the quality of being deep.