LSt.24:17 :ܐܝܟ ܫܡܫܐ ܕܡܘܣܦ ܚܙܝܐ ܠܥܝ̈ܢܐ ܚܠ݁ܝ̈ܡܬܐ ܘܡܣܓܦ ܠܗܠܝܢ ܢܣܝ̈ܣܬܐ‏ : like the Sun, which improves the vision of healthy eyes and damages those that are feeble
See the entire entry for nsīs adj. vexed; frail