Ad. numbers grammar.
We only know two Adûnaic numbers:
satta “two” (SD/428) and
hazad “seven” (SD/247). The Adûnaic number for “one” might be *
ir, derived from the root √
ʔIR “one, alone”; we do know that the number “one” was the only number not considered a noun (SD/428). All other numbers are
considered nouns and follow the noun they modify:
gimlî hazad “seven stars” (SD/428). Formally, the number is in a genitive relationship with the noun: “seven of ships”. Most nouns that
precede a number are inflected into the plural, but nouns that precede the number two are left in the singular:
nârdu satta “two soldier[s]” (SD/428).