warble/ˈwɔrbəl/Third PersonwarblesPresent ParticiplewarblingPast TensewarbledPast Participlewarbled1(of a bird) to produce a melodious, trilling, or warbling song with a series of varying notes and pitches2sing or play with trills, alternating with the half note above or belowSynonyms: quavertrill3sing by changing register; sing by yodelingSynonyms: descantyodel