The term 'MOUNTAIN AIRS' can be broken down into two words, 'MOUNTAIN' and 'AIRS'. The first word, 'MOUNTAIN', refers to a large natural elevation of the Earth's surface that usually has steep sides and a pointed or rounded top. The second word, 'AIRS', is a plural noun meaning a particular way of speaking or behaving that is intended to impress or give an impression of superiority. The crossword solution for this term is 'Yodels', which are a type of singing characterized by rapid changes in pitch from the chest voice to a head voice, usually with a nasal quality. Yodels are often associated with Alpine folk music, and are commonly used to express joy or excitement in the mountains.