English
proofness
From proof + -ness.
Formed from proof + -ness
Proto-Indo-European *pro-bʰH-wó-s ‘being in front’
…
Latin probō ‘to approve; to test’
Late Latin proba ‘a proof’
Old French prove
Middle English proof
English proof
Today it means
noun The degree of proof of alcohol.
Sources
Sources: Wiktionary, “proofness”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / proofness