A word Tolkien used to illustrate Adûnaic pronunciation (pronounced [azdi]) without giving its meaning (SD/421).
Sindarin
maud
maud
maud
?. [unglossed]
madu
?. [unglossed]
cidinn
?. [unglossed]
cinnog
?. [unglossed]
amorvad
noun. breakfast
>> madu. This gloss was rejected.