Swell

素晴らしい

subarashii

(excellent — see also excellent)

うねり

uneri

(series of waves, lasting after the wind has ceased)

起伏

kifuku

(music: gradual crescendo followed by diminuendo)

腫れる

hareru

(intransitive: to become bigger, especially due to being engorged)

膨れる

fukureru

(intransitive: to become bigger, especially due to being engorged)

隆起する

ryūki-suru

(intransitive: to become bigger, especially due to being engorged)