warble
131crwth — Crowd Crowd, n. [W. crwth; akin to Gael. cruit. Perh. named from its shape, and akin to Gr. kyrto s curved, and E. curve. Cf. {Rote}.] An ancient instrument of music with six strings; a kind of violin, being the oldest known stringed instrument… …
132Ditty — Dit ty, v. i. To sing; to warble a little tune. [1913 Webster] Beasts fain would sing; birds ditty to their notes. Herbert. [1913 Webster] …