undulate
un|du|late /'ʌndʒʊleɪt/ (undulates undulating undulated)
[VERB] V, V, also V n
Something that undulates has gentle curves or slopes, or moves gently and slowly up and down or from side to side in an attractive manner. (LITERARY)
As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks...
His body slowly undulated in time to the music.
● undulating [ADJ]
...gently undulating hills.
[VERB] V, V, also V n
Something that undulates has gentle curves or slopes, or moves gently and slowly up and down or from side to side in an attractive manner. (LITERARY)
As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks...
His body slowly undulated in time to the music.
● undulating [ADJ]
...gently undulating hills.