ondoyer znamená v Angličtina

undulate [undulated, undulating, undulates]▼◼◼◼(intransitive: move in wavelike motions)
verb
[UK: ˈʌn.djʊ.leɪt] [US: ˈʌn.dʒə.ˌlet]

billow [billowed, billowing, billows]▼◼◼◼(to surge in billows)
verb
[UK: ˈbɪ.ləʊ] [US: ˈbɪlo.ʊ]