Sidaamu Afoo is the ethnic autonym for the language, while Sidaminya is its name in Amharic.
[1] Another study shows over 64% lexical similarity with Alaba-K'abeena, 62% with Kambaata, and 53% with Hadiyya, all of which are other Highland East Cushitic languages spoken in southwestern Ethiopia.
This can occur when it is so obvious what kind of thing the referent of the noun phrase is, that it is unnecessary for the speaker to mention it.
One type is made up only of an adjective or a numeral, where the adjective or the numeral agrees in case, number, and gender with the referent of a noun phrase.
This is thought to originate from the Afro-Asiatic demonstrative containing t (FEM) or k (MASC).