(PAN: ayŭ 'to blow', PC: ?əiŭ 'to blow, to whistle').Transitive verb.To blow across (musical instrument, as flute).bi ayŭ Transitive verb.To blow across (musical instrument, as flute) (plural). Meaning 1 To blow across a musical instrument such as a flute. Meaning 2 bi ayŭ: to blow across a musical instrument such as a flute, plural.