The 4th phrase of the Lament of Akallabêth (SD/247). One major conceptual change from earlier versions was that the subject of the sentence was plural Bârim an-Adûn (“Lords of the West”) instead of the earlier singular Bârun an-Adûn (“Lord of the West”). It seems that Tolkien decided that the drowning of Númenor was attributed to all of the Valar rather than just Manwë. A similar change from singular to plural was made in the corresponding Quenya sentence: herunūmen >> númeheruvi.
The subject Bârim of this sentence is the subjective plural of bâr “lord”. It is modified by the adjectival phrase an-Adûn “of the West”, with the genitive prefix an- “of” added to the noun adûn. The verb has the 3rd-plural suffix yu- “they”. In the grammatical rules of Lowdham’s Report this makes the subject emphatic, with a meaning more like “It was the Lords of the West who broke the Earth...” (SD/429).
The verb form rahtam is the aorist tense of rahat- “to break” with the verb plural suffix -m. The object of the sentence, dâira “Earth”, is in the normal-case.
The base sentence is modified by the prepositional phrase sâibêth-mâ Êruvô “with assent from Eru”. The combination sâibêth-mâ is the word sâibêth “assent” and the prepositional suffix -mâ “with”. The final word Êruvô is the name Êru and the prepositional suffix -ô “of”, with the usual glide-consonant [w] (which was sometimes written “v” as mentioned on SD/434) between the u and the following suffix.
A noun translated as “lord” (SD/311, 428). This nouns wins the prize for “most inflected Adûnaic noun”, since we have declensions for this noun in both the draft Adûnaic grammar and the later grammar of Lowdham’s Report. As such, it is very helpful for comparing how the noun declensions changed as Tolkien developed Adûnaic grammar. For example, comparing its draft plurals bāri/bārim to its later plural bârî/bârîm indicate the draft plural was originally formed with a short rather than long i. There are a few lingering examples of this short-i plural in later writings (SD/247, 251).
Conceptual Development: In earlier writings the rejected name Kherû “Lord” (SD/376) indicates a possible earlier form of this noun; Kherû itself was changed to Arûn. A similar form reappears in later writings in the name Adûnakhôr “Lord of the West”: either akhôr or khôr “lord”. Whether or not this later word replaced bâr is unknown.