DeMundo 142:8 :ܩܛܝܪܘܬܐ ܕܝܢ ܕܪܓܝܘܬܐ ܕܒܗܝܢ܃ ܡܛܠ ܕܠܐ ܥܕܟܝܠ ܐܬܕܠܠ݂ܬ ܘܐܬܐܫܕܬ‏ : the condensation of the moisture that is in (the clouds), because it has not yet been diminished and rained out
See the entire entry for dll vb. D to diminish something

DeMundo 142:8 :ܩܛܝܪܘܬܐ ܕܝܢ ܕܪܓܝܘܬܐ ܕܒܗܝܢ܃ ܡܛܠ ܕܠܐ ܥܕܟܝܠ ܐܬܕܠܠ݂ܬ ܘܐܬܐܫܕܬ܃ ܥܒܕܬ ܠܩܪܝܪܘܬܗ‏ : the condensation of the moisture that is in (the clouds), because it has not yet thinned out and been poured out, produces its coldness
See the entire entry for qṭīrū, qṭīrūṯā n.f. congealing