wave
noun
a disturbance on the surface of a liquid body, as the sea or a lake, in the form of a moving ridge or swell.
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Her chestnut hair was thick and straight, the little half-curls of the same rich tint that fell over her mother's forehead brushed wavelessly back on each side of a deep widow's peak.
From The Courting Of Lady Jane by Bacon, Josephine Dodge Daskam