Trilled is a type of vocalization that involves rapid repetition of a single sound or syllable. It is often used in singing and is similar to vibrato, but with a more rapid repetition. The term trilled can be used to describe the sound made by a variety of animals, including birds, frogs, and even some insects. In the context of music, trilled notes are often used to add ornamentation and texture to a melody. The crossword solutions SUNG (4 letters), SANG (4 letters), and WARBLED (7 letters) all refer to different types of vocalization that involve trilling. SUNG is a type of singing that involves sustained notes, while SANG is a type of singing that involves short, staccato notes. WARBLED is a type of singing that involves rapid, fluttering notes. All three of these terms refer to vocalizations that involve trilling.