"I need something else."
Translation:Feumaidh mi rudeigin eile.
My understanding is that it means 'some'. Rudeigin = something. Cuideigin = someone. Latha-eigin = some day (though I've never seen this in the wild myself, it's in the dictionary).
This is what Dwelly on Am Faclair Beag has on it: https://www.faclair.com/ViewDictionaryEntry.aspx?ID=4B24B79BB31F708C052D2EAFEFFC40DC