IshIsa 36:21 :ܝܚܒܘܪܐ ܣܢܝܐ ܕܥ݁ܛܪ ܡܢ ܓܘܫܡ̈ܝܗܘܢ ܡܝ̈ܬܐ‏ : the foul, dense vapor being emitted from their dead bodies
See the entire entry for yaḥbūr, yaḥbūrā n.m. dense smoke