A noun translated as “gloom” derived from the root √DAWAR (SD/423). It is an example of how primitive [w] and [j] became [u] and [i] before consonants and finally, thereby producing diphthongs.
Reference ✧ SD/423 ✧ “gloom”
|✶Ad. dāw’r > dâur||[dāwr] > [dāur]||✧ SD/423|