GregOr 41 72.11.29 :ܐܘܣܝܐܝܬ ܕܝܢ ܐܝܟ ܐܢܫ ܢܐܡܪ ܗ݀ܘܐ ܗܘܐ ܐܟܚܕܐ‏ : in substance, then, as one may say, He was together (with us)
See the entire entry for ˀūsīyāˀīṯ adv. essentially