'sandiness' originates from English, specifically formed from the adjective 'sandy' plus the suffix '-ness'; 'sandy' in turn comes from the noun 'sand' (Old English 'sand').

'sand' comes from Old English 'sand'; in Middle English the adjective 'sandy' (sand + -y) developed to mean 'consisting of or covered with sand,' and the abstract noun 'sandiness' was later formed by adding the suffix '-ness' to produce the modern word.

Initially related directly to the physical substance 'sand' (i.e., 'containing sand'), the term evolved into an abstract noun expressing the quality or degree of being sandy and its textural sense.