Ad. †[ōu]
This diphthong appears in some older Adûnaic texts, but by the time of Classical Adûnaic was reduced to [ō] (SD/424).
Reference ✧ SD/424 ✧ ÔU
Phonetic Development
|  |  | > |  | ✧ SD/424 (ÔU > Ô) |