A prepositional element only attested in the late (1968) word nadroth “hind-track”, referring to the wake behind a boat, so perhaps meaning “✱behind” (PM/376). It appears only as a prefix, but in the earlier Adûnaic grammar of Lowdham’s Report (1946), Adûnaic prepositions are used as suffixes (SD/435).
Adûnaic
nadroth
noun. hind-track
nad Reconstructed
preposition. hind, *behind
An Adûnaic noun translated “hind-track”, referring to the wake behind a boat (PM/376). It appeared more than two decades (1968) after Tolkien’s Adûnaic Grammar in Lowdham’s Report from the 1940s (SD/413-440). This noun is inconsistent with the earlier grammar in two respects. First, the prepositional element nad- appears as a prefix, not as a suffix as prepositions did in the earlier grammar (SD/435). Second, it includes a short o, whereas in the earlier phonetic rules of Adûnaic, only a long [ō] is allowed (SD/423). See the entry on conceptual-changes-in-late-Adûnaic for further discussion.