Quiz: Remember the definition of mal de mer?
1640s, from Italian trillio, triglio "a quavering or warbling in singing," probably of imitative origin. The verb is 1660s, from Italian trillare "to quaver, trill." Related: Trilled; trilling.
in phonetics, a vibration or series of flaps (see flap) of the tongue, lips, or uvula against some other part of the mouth. The Spanish rr in perro ("dog") is a tongue trill, and the French r is sometimes pronounced as an uvular trill