undulate
verb (used without object)
to move with a sinuous or wavelike motion; display a smooth rising-and-falling or side-to-side alternation of movement.
Used to describe actions that started in the past and continue into or have direct relevance to the present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"The outline of life, which changes under every respiration, seems to have undulated under the plastic mould of Phidias."
From Blackwood's Edinburgh Magazine — Volume 53, No. 328, February, 1843 by Various