slopinessn.
rare. Apparently only attested in dictionaries or glossaries.
= slopeness n.
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the world > space > relative position > inclination > [noun] > inclination from the level or slope > sloping condition or position
slopeness1551
slopiness1611
slopingness1644
1611 R. Cotgrave Dict. French & Eng. Tongues Talus,..slopenesse, or slopinesse.
1611 R. Cotgrave Dict. French & Eng. Tongues sig. Ssviv/1 Glacis... A sloaping, sloapinesse, gentle bending downewards.
This entry has not yet been fully updated (first published 1912; most recently modified version published online June 2021).
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n.1611