Ps-Clem Hom 11.268:19 :ܗܢ݂ܘܢ ܗܠܝܢ ܨܢܝܥܐܝܬ ܡܘܒܕܝܢ ܠܟܘܢ ܕܠܐ ܬܣܬܟܠܘܢ ܢܟܠܐ ܕܥܠܝܟܘܢ ܗܘܐ‏ : these are destroying you in a cunning way so that you do not realize the guile happening to you
See the entire entry for ṣənīˁāˀīṯ adv. cunningly