English
acidness
From acid + -ness.
A compound of acid + -ness
Proto-Indo-European *h₂eḱ- ‘sharp’
…
Proto-Italic *akēō
Latin aceō ‘to be sour’
Latin acidus ‘sour’
French acide ‘acid’
English acid
Today it means
noun acidity, sourness
Language periods are conventional ranges, not dates for this word.
Etymograph / acidness