IIMac4:4 :ܟܕ ܡܫܬܝܚܢ ܘܡܥܕܪ ܘܡܘܣܦ ܥܠ ܒܝܫܬܗ ܕܣܝܡܘܢ‏ : raging, aiding, and increasing Simon's evil
See the entire entry for šyḥn vb. to make insane