Adûnaic derived from the related Bëorian and Hadorian tongues;
collectively called Taliska of the Atani, and during the Second
Age a Bëorian accent still survived in parts of Númenor, most
notably in Emerië and around the harbour of Andúnië. Most of the
House of Bëor had been killed after the Dagor Bragollach, and
therefore the Hadorian accent had become most prevalent. Adûnaic
seems not to have been influenced by the language of the Second
House of Men, the Haladin tongue, at all: when the Númenóreans
returned to Middle-earth in the Second Age, they did not
recognise the peoples of Enedwaith and Minhiriath as their
distant kin, because these spoke Haladin languages. The Westron
or Common Speech, widely spoken in Middle-earth during the Third
Age, was largely derived from Adûnaic. The Black Númenóreans of
Umbar and other Númenórean colonies spoke a related tongue
during the Third Age called Black Adûnaic, which was closer to
the old tongue as it was not enriched with Elvish influences.