EphPar 15:6.3 : ܠܟܠ ܬܪܥ ܕܐܚܝܕ ܐܩܠܝܕܐ ܗܘ ܡܪܟܒ ܠܗ‏ : that key is engineered for every locked door
See the entire entry for rkb vb. to mount