Refers to one or more houses with one owner: can be "their house" or "their houses". Compare to singular nyewaa, "his/her house".
Base is 'ewaa "house", with prefix nye- for "his/her". Some nouns take a special prefix nyeche- for multiple owners, meaning "their".
Recording is slightly unnatural: The stress should be on the last syllable, as in most Kumeyaay words, though the speaker may have been emphasizing the first syllable in this recording.