LSt.64:13 :ܥܛܠ ܬܪܥܝܬܐ ܕܠܐ ܡܩܒܠ ܗܘܐ ܝܘܠܦܢܐ‏ : a stupid-minded one who does not accept instruction
See the entire entry for ˁṭel, ˁaṭlā adj. difficult, tough