TDN.116:11 :ܘܚܦܝ݂ܛܐ ܘܡ݂ܬܐܡܢ ܘܟ݁ܐܫ ܠܘܬ ܗܘ݁ ܕܡ݁ܠܦ ܠܗ ܒܥܡܠܐ‏ : he is diligent and constant and keep quiet toward the one teaching him in the work
See the entire entry for kwš vb. to stay quiet