✶Ad. [ʔ] vanished early; [ʔ] > [ø]

✶Ad. [ʔ] vanished early; [ʔ] > [ø]
Tolkien indicated that the glottal stop [ʔ] “disappeared very early” from Primitive Adûnaic (SD/419). Whether it had any affect on adjacent sounds is not clear.

Reference ✧ SD/419

Related

Phonetic Rule Elements

[ʔ] > [ø] ✧ SD/419 (? > [ø])