undulate

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The river, broad, deep, and rapid, wound at the foot of a rocky precipitous cliff: a belt of wood followed its course, and the horizon terminated in the distant undulations of the turf-plain.
Though I passed over it as gently as possible, the slight undulations produced by my boat extended almost as far as I could see, and gave a ribbed appearance to the reflections.
As if at a given signal, the run of the smooth undulations seemed checked suddenly around the brig.
And the run of the slight swell was so smooth that it resembled the graceful undulation of a piece of shimmering gray silk shot with gleams of green.
The undulations of the human surge reached the steps, while all the heads floundered on the surface like a sea agitated by a squall.
The rhythmical and, if I may so say, well-modulated undulation of the back in our ladies of Circular rank is envied and imitated by the wife of a common Equilateral, who can achieve nothing beyond a mere monotonous swing, like the ticking of a pendulum; and the regular tick of the Equilateral is no less admired and copied by the wife of the progressive and aspiring Isosceles, in the females of whose family no "back-motion" of any kind has become as yet a necessity of life.
I had the curiosity to place a mirror before me; and ere long saw reflected there, a curious involved worming and undulation in the atmosphere over my head.
This surmise was confirmed, as presently,--over the brow of a distant undulation in the road, I descried a farmer's gig driven by another young woman.
The narwhal seemed motionless; perhaps, tired with its day's work, it slept, letting itself float with the undulation of the waves.
Tapisserie steers her own course It did not look promising early on for Tapisserie in the 7f Listed Eternal Stakes as she was last and struggling to cope with the undulations at Carlisle.
TRACKFACTS CHEPSTOW: A left handed oval track, approximately two miles in circumference, with significant undulations, which joins the straight course five furlongs from home.
Despite some undulations this can be described as a galloping track.