English
hackproof
From hack + -proof.
Formed from hack + -proof
Proto-Indo-European *keg-
Proto-Germanic *hakkōną ‘to chop’
Proto-West Germanic *hakkōn ‘to hack, chop’
Old English *haccian ‘to hack’
Middle English hacken
English hack
Today it means
adj Secure from hackers; impossible to hack into.
Language periods are conventional ranges, not dates for this word.
Etymograph / hackproof