Rev 12:10 :ܕܸܐܬ݂ܪܡܝܼ ܡܵܣܘ݂ܪܵܐ ܕܲܐܚܲܝܢ‏ : for the betrayer of our brothers is cast down
See the entire entry for māsōr, māsōrā nom.ag. betrayer