Kays 230:9 :ܥܠ ܡܝ̈ܐ ܒܢ݁ܝܢ ܐܙܓ̈ܐ ܐܪ̈ܝ݂ܟܐ ܘܪ̈ܘܝ݂ܚܐ܂ ܘܠܥܠ ܡ݂ܢܗܘܢ ܬܘ݂ܒ ܐܙܓ̈ܐ ܐ̄ܚܪ̈ܢܐ‏ : they build long and broad vaults above the water and, further, other vaults on top of those
See the entire entry for *ˀazeḡ, ˀazgā n.m. archway, vault

Kays 230:9 :ܟܕ ܒܢܝܢ ܡܕܝ݂ܢ̈ܬܐ ܚ݁ܦܪܝܢ ܐܪܥܐ ܘܡܥܡܩܝܢ ܥܕܡܐ ܠܡܝ̈ܐ‏ : when they build cities they dig the ground and go down deep to the water level
See the entire entry for ˁmq vb. to become deep