The Collaborative International Dictionary
Intransgressible
Intransgressible \In`trans*gress"i*ble\, a. [L. intragressibilis
that can not be crossed. See In- not, and Transgress.]
Incapable of being transgressed; not to be passed over or
crossed.
--Holland.
Wiktionary
intransgressible
a. Incapable of being transgressed; not to be passed over or crossed.