IshGen 31:1 :ܘܐܝܟܢܐ ܕܟܕ ܬܡܚܐ ܠܚܝܘܬܐ ܥܠ ܪܫܗ݀ ܐܘ݁ ܬܨܪܐ ܪ̈ܓܠܝܗ݀ ܢܦ݁ܩ ܕܡܐ‏ : just as blood comes out when you strike an animal on its head or mangle its feet
See the entire entry for ṣry vb. to split s.t. and penetrate