English
thornproof
From thorn + -proof.
Formed from thorn + -proof
Proto-Indo-European *tr̥nós ‘sharp, stiff’
Proto-Germanic *þurnaz ‘thorn, briar’
Proto-West Germanic *þorn ‘thorn, briar’
Old English þorn
Middle English thorn ‘a thorn’
English thorn
Today it means
adj Resistant to tearing by thorns.
Sources
Sources: Wiktionary, “thornproof”. 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 / thornproof