AGnEx 7.27 :ܕܐܬܟܣܝ ܡܢܗܘܢ ܘܫܢ݂ܩ ܐܢܘܢ܂ ܘܐܬܓܠܝ ܠܗܘܢ‏ : that [Joseph] kept himself hidden from [his brothers], and tormented them, and then revealed himself to them
See the entire entry for šnq vb. D to torture