UNDULATE
undulate
(adjective) having a wavy margin and rippled surface
undulate
(verb) increase and decrease in volume or pitch, as if in waves; “The singer’s voice undulated”
ripple, ruffle, riffle, cockle, undulate
(verb) stir up (water) so as to form ripples
roll, undulate
(verb) occur in soft rounded shapes; “The hills rolled past”
Source: WordNet® 3.1
Etymology
Verb
undulate (third-person singular simple present undulates, present participle undulating, simple past and past participle undulated)
(transitive) To cause to move in a wavelike motion.
(transitive) To cause to resemble a wave
(intransitive) To move in wavelike motions.
(intransitive) To appear wavelike.
Adjective
undulate (comparative more undulate, superlative most undulate)
Wavy in appearance or form.
Changing the pitch and volume of one's voice.
(botany, of a margin) sinuous, winding up and down.
Source: Wiktionary
Un"du*late, a. Etym: [L. undulatus undulated, wavy, a dim. from unda
a wave; cf. AS. unnr; perhaps akin to E. water. Cf. Abound, Inundate,
Redound, Surround.]
Definition: Same as Undulated.
Un"du*late, v. t. [imp. & p. p. Undulated; p. pr. & vb. n.
Undulating.]
Definition: To cause to move backward and forward, or up and down, in
undulations or waves; to cause to vibrate.
Breath vocalized, that is, vibrated and undulated. Holder.
Un"du*late, v. i.
Definition: To move in, or have, undulations or waves; to vibrate; to wave;
as, undulating air.
Source: Webster’s Unabridged Dictionary 1913 Edition