English
thoughtproof
From thought + -proof.
Formed from thought + -proof
Proto-Indo-European *teng- ‘to think’
…
Proto-Germanic *þanhtaz ‘thought’
Proto-West Germanic *þą̄ht
Old English þōht
Middle English thought ‘product of mental activity’
English thought
Today it means
adj Resistant to thought; not permitting a person to think.
Sources
Sources: Wiktionary, “thoughtproof”. 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 / thoughtproof