IshExod 20:23 :ܙܒܢܐ ܠܡܫܒܠܘ܂ ܗ݀ܝ ܕܡܚ̈ܝ ܟܢܐ܂ ܗܢܘ ܫܪܪ ܥܩܪܐ ܘܐܬܩܛܪ ܓܠܐ‏ : the time to form a stem: i.e. that it "strikes" a stem, that is to say the root became firm and the stalk tightened
See the entire entry for šbl#2 vb. to make a stem