AGnEx 21.27 :ܩܫܝܫ ܗܘܐ ܕܝܢ ܕܐܝܟ ܕܒܝܘܡ ܚܡܫܥܣܪܐ ܡܫܡܠܝ ܗܘܐ‏ : [the moon] was old inasmuch as it was fully formed as on the fifteenth day
See the entire entry for məšamlay adj. perfect