Kays 196:11 :ܠܐ ܡܬܒܨܝܢܘ݂ܬ ܚܘ݂ܫܒܐ ܕܥܠ ܠܐ ܡܣܝܟܘ݂ܬܗ݀‏ : the impossibility of thought investigating its endlessness
See the entire entry for mɘsayyəḵū, mɘsayyəḵūṯā n.f. boundary, circumference