IshDan 103(20) :ܫܝܘܬܐ܃ ܡܕܡ ܕܫ݁ܘܐ ܘܡܫܡܠܝ ܒܚܙܬܐ܂ ܐܚܪ̈ܢܐ ܕܓܘܢܐ ܠܡ ܕܩܝܡ ܒܝܬܗ ܟܕ ܠܐ ܡܫܚܠܦ ܒܡܕܡ‏ : ܫܝܘܬܐ : something that is right and perfected in appearance; others (say): the complexion that remains in itself when it is not changed into something
See the entire entry for šiyyūṯ, šiyyūṯā n.m. quality, fine appearance