JSmem 5:13 :ܢܚ݂ܦܘܪ ܠܫ݂ܢܝ ܒܟܪܡܐ ܕܐܪܙ݁ܝܟ ܟܫܝܪܐܝܬ‏ : may my tongue delve skillfully into the vineyard of your mysteries
See the entire entry for kaššīrāˀīṯ adv. skillfully