sb. and v. Reduplication of TRILL sb.2 and v.3, representing a repeated or continued trill or trilling. So also Trill-rill int.
1849. Cupples, Green Hand, xv. You heard a low, half-smothered, small sound, deeper down, as it were, fill up the break with its throbbing and trill-trilling, as if just one land-cricket or a grasshopper did it.
1859. Cornwallis, New World, I. 160. The trill trill of many a gaudy plumaged tenant of the woods.
1903. Academy, 21 Feb., 186/2. I heard the thrush to-day … ‘Trill-rill!’ he kept on trilling.
